Recognised as Number
4,720
- Positive
- Even
- Composite
- 4 digits
4,720 is an even 4-digit integer and a composite number. It has 20 divisors and a digital root of 4.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value4,720
Digit count4
Digit sum13
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^4 × 5 × 59
Distinct prime factors32, 5, 59
Number of divisors20
Sum of divisors σ(n)11,160
Aliquot sum6,440sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)1,856integers below n that share no factor with it
Carmichael function λ(n)116the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 1,856
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1,180, 2,360, 4,72020 in total
Arithmetic
Previous number4,719
Next number4,721
Double9,440
Half2,360
Square22,278,400
Cube105,154,048,000
Square root68.702256149≈irrational, shown to 9 decimal places
Cube root16.774413053≈
Negation-4,720
Reciprocal0.0002118644≈
Representations
Decimal4,720
Binary100100111000013 bits
Octal11160
Hexadecimal1270
Base 363N4
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsfour thousand, seven hundred and twenty
Ordinalfour thousand, seven hundred and twentieth
Scientific notation4.72 × 10^3
Engineering notation4.72 × 10^3
In other bases
Ternary20110211base 3; the most digit-efficient integer base after e: 8 digits
Quinary122340base 5; one hand: 6 digits
Septenary16522base 7: 5 digits
Nonary6424base 9; each digit is two ternary digits: 4 digits
Duodecimal2894base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 4 digits
Vigesimalbg0base 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal1:18:40base 60; Babylonian, and still how an hour and a circle are divided: 3 digits
Balanced ternary1T0111T11digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1011110110000base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0001001001110000
Bit length13 bitsto write the magnitude
Set bits5the population count, or Hamming weight
Zero bits8within that length
Bit parityodd5 set bits, so odd; not the same as the number itself being even
Highest set bitbit 12worth 4,096
Lowest set bitbit 44 trailing zeros
Power of twoNo
Bytes212 70
Gray code1101101001000n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0001001001110000
32-bit00000000000000000001001001110000
64-bit0000000000000000000000000000000000000000000000000001001001110000
One's complement1110110110001111at 16 bits, every bit flipped
Bits reversed0000111001001000at 16 bits
Rotated left by 10010010011100000at 16 bits, wrapping
Shifted left by 110010011100000= 9,440, no wrap
Shifted right by 1100100111000= 2,360, discarding the low bit
These bits as a double2.33198985 × 10^-320≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
4,720 to the power 222,278,400
4,720 to the power 3105,154,048,000
4,720 to the power 4496,327,106,560,000
4,720 to the power 52,342,663,942,963,200,000
First ten multiples4,720, 9,440, 14,160, 18,880, 23,600, 28,320, 33,040, 37,760, 42,480, 47,200
Powers of twoBetween 2^12 (4,096) and 2^13 (8,192)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 2
Divisible by 8Yes
Divisible by 9No, remainder 4
Divisible by 10Yes
Divisible by 11No, remainder 1
Divisible by 12No, remainder 4
Divisible by 100No, remainder 20
Collatz (3n + 1) trajectory
Steps to reach 159the total stopping time
Highest value reached4,720
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps4,720 → 2,360 → 1,180 → 590 → 295 → 886 → 443 → 1,330 → 665 → 1,996 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage472,000%
4,720% as a decimal47.2
4,720% of 1004,720
4,720% of 1,00047,200
As a fraction of 1004,720/100
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Derived from 4,720
Also reads as
4720 (year)
- Leap year
- 366 days
- 48th century
- Rat
- 53 ISO weeks
4720 will be a leap year of 366 days. It begins on a Thursday and ends on a Friday. Easter Sunday falls on 4 April.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Thursday and Friday366 days is 52 weeks and 2 days, and the remainder starts on the weekday 1 January falls on
Sundays52
Mondays52
Tuesdays52
Wednesdays52
Thursdays53one of the extras
Fridays53one of the extras
Saturdays52
Friday the 13th2 of them13 February, 13 August
ISO weeks53a long year: 1 January is a Thursday, or a Wednesday in a leap year, so a week 53 exists
Same calendar as4680the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in4748, 4776, 480428 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 4720
January31 days, starts Thursday
February29 days, starts Sunday
August31 days, starts Sunday
September30 days, starts Wednesday
October31 days, starts Friday
November30 days, starts Monday
December31 days, starts Wednesday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start86,781,542,400
Unix timestamp at the end86,813,164,799
Years from now2,694 years from now
Days from today983,706 days to 1 January
The number 4720
As a number4,720
In wordsfour thousand, seven hundred and twenty
Roman numeralsNot defined above 3,999
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Also reads as
#447722 (colour)
- #447722
- Green
- Dark
- Nearest: Dark green
#447722 is a green with RGB values 68, 119, 34 and HSL 96°, 56%, 30%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Dark green.
Colour values
#447722#447722
HEX#447722
HEX (short)#472
RGBrgb(68, 119, 34)
RGB (0–1)0.2667, 0.4667, 0.1333
RGB percentages26.7%, 46.7%, 13.3%
HSLhsl(96, 55.6%, 30%)
HSV / HSBhsv(96, 71.4%, 46.7%)
CMYK42.9%, 0%, 71.4%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,486,946
CSS custom property--colour: #447722;
Brightness & contrast
Relative luminance0.14538WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.37:1
Contrast with white5.37:1WCAG normal text: AA
Contrast with black3.91:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#BB88DD
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.37:1WCAG large text: AAA
Contrast with black, large text3.91:1WCAG large text: AA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#552277
Analogous#6F7722, #22772B
Triadic#224477, #772244
Split complementary#2A2277, #77226F
Tetradic#226F77, #552277, #772A22
Tints, shades & saturation
Channel breakdown
R68
G119
B34
Red68 (26.7%)
Green119 (46.7%)
Blue34 (13.3%)
Hue96°
Saturation (HSL)55.56%
Lightness30%
Dominant channelGreen
Hex per channelR 44 · G 77 · B 22
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Harmonies
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