Recognised as Number
1,443
- Positive
- Odd
- Composite
- 4 digits
1,443 is an odd 4-digit integer and a composite number. It has 8 divisors and a digital root of 3.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value1,443
Digit count4
Digit sum12
Digit product48
Multiplicative persistence3times the digit product can be taken before one digit is left
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3 × 13 × 37
Distinct prime factors33, 13, 37
Number of divisors8
Sum of divisors σ(n)2,128
Aliquot sum685sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)864integers below n that share no factor with it
Carmichael function λ(n)36the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 864
Möbius function μ(n)−13 distinct prime factors, an odd number of them
SquarefreeYesno repeated prime factor
All divisors1, 3, 13, 37, 39, 111, 481, 1,4438 in total
Arithmetic
Representations
Decimal1,443
Binary1011010001111 bits
Octal2643
Hexadecimal5A3
Base 36143
Roman numeralMCDXLIII
In wordsone thousand, four hundred and forty-three
Ordinalone thousand, four hundred and forty-third
Scientific notation1.443 × 10^3
Engineering notation1.443 × 10^3
In other bases
Ternary1222110base 3; the most digit-efficient integer base after e: 7 digits
Quinary21233base 5; one hand: 5 digits
Septenary4131base 7: 4 digits
Nonary1873base 9; each digit is two ternary digits: 4 digits
Duodecimala03base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal3c3base 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal24:3base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary1T00T110digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1101011100111base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000010110100011
Bit length11 bitsto write the magnitude
Set bits6the population count, or Hamming weight
Zero bits5within that length
Bit parityeven6 set bits, so even; not the same as the number itself being odd
Highest set bitbit 10worth 1,024
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes205 a3
Gray code11101110010n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000010110100011
32-bit00000000000000000000010110100011
64-bit0000000000000000000000000000000000000000000000000000010110100011
One's complement1111101001011100at 16 bits, every bit flipped
Bits reversed1100010110100000at 16 bits
Rotated left by 10000101101000110at 16 bits, wrapping
Shifted left by 1101101000110= 2,886, no wrap
Shifted right by 11011010001= 721, discarding the low bit
These bits as a double7.12936727 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
1,443 to the power 22,082,249
1,443 to the power 33,004,685,307
1,443 to the power 44,335,760,898,001
1,443 to the power 56,256,502,975,815,443
First ten multiples1,443, 2,886, 4,329, 5,772, 7,215, 8,658, 10,101, 11,544, 12,987, 14,430
Powers of twoBetween 2^10 (1,024) and 2^11 (2,048)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 3
Divisible by 5No, remainder 3
Divisible by 6No, remainder 3
Divisible by 7No, remainder 1
Divisible by 8No, remainder 3
Divisible by 9No, remainder 3
Divisible by 10No, remainder 3
Divisible by 11No, remainder 2
Divisible by 12No, remainder 3
Divisible by 100No, remainder 43
Collatz (3n + 1) trajectory
Steps to reach 147the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps1,443 → 4,330 → 2,165 → 6,496 → 3,248 → 1,624 → 812 → 406 → 203 → 610 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage144,300%
1,443% as a decimal14.43
1,443% of 1001,443
1,443% of 1,00014,430
As a fraction of 1001,443/100
Read another way
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Derived from 1,443
Also reads as
1443 (year)
- Common year
- 365 days
- 15th century
- Pig
1443 was a common year of 365 days. It began on a Sunday and ended on a Sunday. Easter Sunday fell on 26 March.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Sunday365 days is 52 weeks and 1 day, and the remainder starts on the weekday 1 January falls on
Sundays53one of the extras
Mondays52
Tuesdays52
Wednesdays52
Thursdays52
Fridays52
Saturdays52
Friday the 13th2 of them13 January, 13 October
ISO weeks52an ordinary 52-week year
Same calendar as1437the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in1454, 1465, 147111 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 1443
January31 days, starts Sunday
February28 days, starts Wednesday
August31 days, starts Tuesday
September30 days, starts Friday
October31 days, starts Sunday
November30 days, starts Wednesday
December31 days, starts Friday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start-16,630,531,200
Unix timestamp at the end-16,598,995,201
Years from now583 years ago
Days from today213,200 days since 1 January
The number 1443
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Also reads as
#114444 (colour)
- #114444
- Cyan
- Dark
- Nearest: Dark slate grey
#114444 is a cyan with RGB values 17, 68, 68 and HSL 180°, 60%, 17%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#114444#114444
HEX#114444
HEX (short)#144
RGBrgb(17, 68, 68)
RGB (0–1)0.0667, 0.2667, 0.2667
RGB percentages6.7%, 26.7%, 26.7%
HSLhsl(180, 60%, 16.7%)
HSV / HSBhsv(180, 75%, 26.7%)
CMYK75%, 0%, 0%, 73.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,131,588
CSS custom property--colour: #114444;
Brightness & contrast
Relative luminance0.04671WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.86:1
Contrast with white10.86:1WCAG normal text: AAA
Contrast with black1.93:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#EEBBBB
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.86:1WCAG large text: AAA
Contrast with black, large text1.93:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#441111
Analogous#11442A, #112A44
Triadic#441144, #444411
Split complementary#44112A, #442A11
Tetradic#2A1144, #441111, #2A4411
Tints, shades & saturation
Channel breakdown
R17
G68
B68
Red17 (6.7%)
Green68 (26.7%)
Blue68 (26.7%)
Hue180°
Saturation (HSL)60%
Lightness16.67%
Dominant channelGreen and Blue
Hex per channelR 11 · G 44 · B 44
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