Recognised as Number
729,420
- Positive
- Even
- Composite
- 6 digits
729,420 is an even 6-digit integer and a composite number. It has 24 divisors and a digital root of 6.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value729,420
Digit count6
Digit sum24
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root6repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 3 × 5 × 12,157
Distinct prime factors42, 3, 5, 12,157
Number of divisors24
Sum of divisors σ(n)2,042,544
Aliquot sum1,313,124sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)194,496integers below n that share no factor with it
Carmichael function λ(n)12,156the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 194,496
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 12,157, 24,314, 36,471, 48,628, 60,785, 72,942, 121,570, 145,884, 182,355, 243,140, 364,710, 729,42024 in total
Arithmetic
Representations
Decimal729,420
Binary1011001000010100110020 bits
Octal2620514
HexadecimalB214C
Base 36FMTO
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsseven hundred and twenty-nine thousand, four hundred and twenty
Ordinalseven hundred and twenty-nine thousand, four hundred and twentieth
Scientific notation7.2942 × 10^5
Engineering notation729.42 × 10^3
In other bases
Ternary1101001120120base 3; the most digit-efficient integer base after e: 13 digits
Quinary141320140base 5; one hand: 9 digits
Septenary6125406base 7: 7 digits
Nonary1331516base 9; each digit is two ternary digits: 7 digits
Duodecimal2b2150base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 6 digits
Vigesimal4b3b0base 20; hands and feet, and the Mayan and Yoruba systems: 5 digits
Sexagesimal3:22:37:0base 60; Babylonian, and still how an hour and a circle are divided: 4 digits
Balanced ternary110101TTT1TT0digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary111110110000101011100base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
00000000000010110010000101001100
Bit length20 bitsto write the magnitude
Set bits8the population count, or Hamming weight
Zero bits12within that length
Bit parityeven8 set bits, so even; not the same as the number itself being even
Highest set bitbit 19worth 524,288
Lowest set bitbit 22 trailing zeros
Power of twoNo
Bytes30b 21 4c
Gray code11101011000111101010n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
32-bit00000000000010110010000101001100
64-bit0000000000000000000000000000000000000000000010110010000101001100
One's complement11111111111101001101111010110011at 32 bits, every bit flipped
Bits reversed00110010100001001101000000000000at 32 bits
Rotated left by 100000000000101100100001010011000at 32 bits, wrapping
Shifted left by 1101100100001010011000= 1,458,840, no wrap
Shifted right by 11011001000010100110= 364,710, discarding the low bit
These bits as a double3.60381363 × 10^-318≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
729,420 to the power 2532,053,536,400
729,420 to the power 3388,090,490,520,888,000
729,420 to the power 4283,080,965,595,746,124,960,000
729,420 to the power 5206,484,917,924,849,138,468,323,200,000
First ten multiples729,420, 1,458,840, 2,188,260, 2,917,680, 3,647,100, 4,376,520, 5,105,940, 5,835,360, 6,564,780, 7,294,200
Powers of twoBetween 2^19 (524,288) and 2^20 (1,048,576)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6Yes
Divisible by 7No, remainder 6
Divisible by 8No, remainder 4
Divisible by 9No, remainder 6
Divisible by 10Yes
Divisible by 11No, remainder 10
Divisible by 12Yes
Divisible by 100No, remainder 20
Collatz (3n + 1) trajectory
Steps to reach 1180the total stopping time
Highest value reached1,038,5801× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps729,420 → 364,710 → 182,355 → 547,066 → 273,533 → 820,600 → 410,300 → 205,150 → 102,575 → 307,726 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage72,942,000%
729,420% as a decimal7,294.2
729,420% of 100729,420
729,420% of 1,0007,294,200
As a fraction of 100729,420/100
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Derived from 729,420
Also reads as
#729420 (colour)
- #729420
- Green
- Dark
- Nearest: Olivedrab
#729420 is a green with RGB values 114, 148, 32 and HSL 78°, 64%, 35%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Olivedrab.
Colour values
#729420#729420
HEX#729420
RGBrgb(114, 148, 32)
RGB (0–1)0.4471, 0.5804, 0.1255
RGB percentages44.7%, 58%, 12.5%
HSLhsl(77.6, 64.4%, 35.3%)
HSV / HSBhsv(77.6, 78.4%, 58%)
CMYK23%, 0%, 78.4%, 42%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,509,024
CSS custom property--colour: #729420;
Brightness & contrast
Relative luminance0.24862WCAG 2.x, 0 is black and 1 is white
Perceived brightness129.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.97:1
Contrast with white3.52:1WCAG normal text: Fail
Contrast with black5.97:1WCAG normal text: AA
Greyscale equivalent#848484
Inverted#8D6BDF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.52:1WCAG large text: AA
Contrast with black, large text5.97:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#422094
Analogous#947C20, #389420
Triadic#207294, #942072
Split complementary#203894, #7C2094
Tetradic#20947C, #422094, #942038
Tints, shades & saturation
Channel breakdown
R114
G148
B32
Red114 (44.7%)
Green148 (58%)
Blue32 (12.5%)
Hue77.59°
Saturation (HSL)64.44%
Lightness35.29%
Dominant channelGreen
Hex per channelR 72 · G 94 · B 20
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Harmonies
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