Recognised as Number
729,012
- Positive
- Even
- Composite
- 6 digits
729,012 is an even 6-digit integer and a composite number. It has 24 divisors and a digital root of 3.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value729,012
Digit count6
Digit sum21
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 3 × 79 × 769
Distinct prime factors42, 3, 79, 769
Number of divisors24
Sum of divisors σ(n)1,724,800
Aliquot sum995,788sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)239,616integers below n that share no factor with it
Carmichael function λ(n)9,984the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 239,616
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 6, 12, 79, 158, 237, 316, 474, 769, 948, 1,538, 2,307, 3,076, 4,614, 9,228, 60,751, 121,502, 182,253, 243,004, 364,506, 729,01224 in total
Arithmetic
Representations
Decimal729,012
Binary1011000111111011010020 bits
Octal2617664
HexadecimalB1FB4
Base 36FMIC
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsseven hundred and twenty-nine thousand and twelve
Ordinalseven hundred and twenty-nine thousand and twelfth
Scientific notation7.29012 × 10^5
Engineering notation729.012 × 10^3
In other bases
Ternary1101001000110base 3; the most digit-efficient integer base after e: 13 digits
Quinary141312022base 5; one hand: 9 digits
Septenary6124254base 7: 7 digits
Nonary1331013base 9; each digit is two ternary digits: 7 digits
Duodecimal2b1a70base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 6 digits
Vigesimal4b2acbase 20; hands and feet, and the Mayan and Yoruba systems: 5 digits
Sexagesimal3:22:30:12base 60; Babylonian, and still how an hour and a circle are divided: 4 digits
Balanced ternary1101001000110digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary111110110000011110100base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
00000000000010110001111110110100
Bit length20 bitsto write the magnitude
Set bits12the population count, or Hamming weight
Zero bits8within that length
Bit parityeven12 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 1f b4
Gray code11101001000001101110n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
32-bit00000000000010110001111110110100
64-bit0000000000000000000000000000000000000000000010110001111110110100
One's complement11111111111101001110000001001011at 32 bits, every bit flipped
Bits reversed00101101111110001101000000000000at 32 bits
Rotated left by 100000000000101100011111101101000at 32 bits, wrapping
Shifted left by 1101100011111101101000= 1,458,024, no wrap
Shifted right by 11011000111111011010= 364,506, discarding the low bit
These bits as a double3.60179785 × 10^-318≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
729,012 to the power 2531,458,496,144
729,012 to the power 3387,439,621,190,929,728
729,012 to the power 4282,448,133,123,642,062,868,736
729,012 to the power 5205,908,078,424,732,547,536,062,968,832
First ten multiples729,012, 1,458,024, 2,187,036, 2,916,048, 3,645,060, 4,374,072, 5,103,084, 5,832,096, 6,561,108, 7,290,120
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 5No, remainder 2
Divisible by 6Yes
Divisible by 7No, remainder 4
Divisible by 8No, remainder 4
Divisible by 9No, remainder 3
Divisible by 10No, remainder 2
Divisible by 11No, remainder 9
Divisible by 12Yes
Divisible by 100No, remainder 12
Collatz (3n + 1) trajectory
Steps to reach 1211the total stopping time
Highest value reached729,012
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps729,012 → 364,506 → 182,253 → 546,760 → 273,380 → 136,690 → 68,345 → 205,036 → 102,518 → 51,259 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage72,901,200%
729,012% as a decimal7,290.12
729,012% of 100729,012
729,012% of 1,0007,290,120
As a fraction of 100729,012/100
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Derived from 729,012
Also reads as
#729012 (colour)
- #729012
- Green
- Dark
- Nearest: Olivedrab
#729012 is a green with RGB values 114, 144, 18 and HSL 74°, 78%, 32%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Olivedrab.
Colour values
#729012#729012
HEX#729012
RGBrgb(114, 144, 18)
RGB (0–1)0.4471, 0.5647, 0.0706
RGB percentages44.7%, 56.5%, 7.1%
HSLhsl(74.3, 77.8%, 31.8%)
HSV / HSBhsv(74.3, 87.5%, 56.5%)
CMYK20.8%, 0%, 87.5%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,507,986
CSS custom property--colour: #729012;
Brightness & contrast
Relative luminance0.23568WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.71:1
Contrast with white3.68:1WCAG normal text: Fail
Contrast with black5.71:1WCAG normal text: AA
Greyscale equivalent#818181
Inverted#8D6FED
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.68:1WCAG large text: AA
Contrast with black, large text5.71:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#301290
Analogous#906F12, #339012
Triadic#127290, #901272
Split complementary#123390, #6F1290
Tetradic#12906F, #301290, #901233
Tints, shades & saturation
Channel breakdown
R114
G144
B18
Red114 (44.7%)
Green144 (56.5%)
Blue18 (7.1%)
Hue74.29°
Saturation (HSL)77.78%
Lightness31.76%
Dominant channelGreen
Hex per channelR 72 · G 90 · B 12
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Harmonies
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