Number
808,080
- Positive
- Even
- Composite
- 6 digits
808,080 is an even 6-digit integer and a composite number. It has 160 divisors and a digital root of 6.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value808,080
Digit count6
Digit sum24
Digital root6repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^4 × 3 × 5 × 7 × 13 × 37
Distinct prime factors62, 3, 5, 7, 13, 37
Number of divisors160
Sum of divisors σ(n)3,166,464
Aliquot sum2,358,384sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)165,888integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 37, 39, 40, 42, 48, 52, 56, 60, 65, 70, 74, 78, 80, 84, 91, 104, 105, 111, 112, 120, 130, 140, 148, 156, 168, 182, 185, 195, 208, 210, 222, 240, 259, 260, 273, 280, 296, 312, 336, 364, 370, 390, 420, 444, 455, 481, 518, 520, 546, 555, 560, 592, 624, 728, 740, 777, 780, 840, 888, 910, 962, 1,036, 1,040, 1,092, 1,110, 1,295, 1,365, 1,443, 1,456, 1,480, 1,554, 1,560, 1,680, 1,776, 1,820, 1,924, 2,072, 2,184, 2,220, 2,405, 2,590, 2,730, 2,886, 2,960, 3,108, 3,120, 3,367, 3,640, 3,848, 3,885, 4,144, 4,368, 4,440, 4,810, 5,180, 5,460, 5,772, 6,216, 6,734, 7,215, 7,280, 7,696, 7,770, 8,880, 9,620, 10,101, 10,360, 10,920, 11,544, 12,432, 13,468, 14,430, 15,540, 16,835, 19,240, 20,202, 20,720, 21,840, 23,088, 26,936, 28,860, 31,080, 33,670, 38,480, 40,404, 50,505, 53,872, 57,720, 62,160, 67,340, 80,808, 101,010, 115,440, 134,680, 161,616, 202,020, 269,360, 404,040, 808,080160 in total
Arithmetic
Representations
Decimal808,080
Binary1100010101001001000020 bits
Octal3052220
HexadecimalC5490
Base 36HBIO
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordseight hundred and eight thousand and eighty
Ordinaleight hundred and eight thousand and eightieth
Scientific notation8.0808 × 10^5
Engineering notation808.08 × 10^3
Nearest landmarks
Powers & multiples
808,080 to the power 2652,993,286,400
808,080 to the power 3527,670,814,874,112,000
808,080 to the power 4426,400,232,083,472,424,960,000
808,080 to the power 5344,565,499,542,012,397,161,676,800,000
First ten multiples808,080, 1,616,160, 2,424,240, 3,232,320, 4,040,400, 4,848,480, 5,656,560, 6,464,640, 7,272,720, 8,080,800
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 7Yes
Divisible by 8Yes
Divisible by 9No, remainder 6
Divisible by 10Yes
Divisible by 11No, remainder 9
Divisible by 12Yes
Divisible by 100No, remainder 80
Collatz (3n + 1) trajectory
Steps to reach 1100the total stopping time
Highest value reached808,080
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps808,080 → 404,040 → 202,020 → 101,010 → 50,505 → 151,516 → 75,758 → 37,879 → 113,638 → 56,819 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage80,808,000%
808,080% as a decimal8,080.8
808,080% of 100808,080
808,080% of 1,0008,080,800
As a fraction of 100808,080/100
Read another way
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Derived from 808,080
Also reads as
#808080 (colour)
- #808080
- Grey
- Dark
- Named: Gray
#808080 is the CSS colour grey with RGB values 128, 128, 128 and HSL 0°, 0%, 50%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Gray.
Colour values
#808080#808080
HEX#808080
RGBrgb(128, 128, 128)
RGB (0–1)0.502, 0.502, 0.502
RGB percentages50.2%, 50.2%, 50.2%
HSLhsl(0, 0%, 50.2%)
HSV / HSBhsv(0, 0%, 50.2%)
CMYK0%, 0%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,421,504
CSS custom property--colour: #808080;
Brightness & contrast
Relative luminance0.21586WCAG 2.x, 0 is black and 1 is white
Perceived brightness128 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.32:1
Contrast with white3.95:1WCAG normal text: Fail
Contrast with black5.32:1WCAG normal text: AA
Greyscale equivalent#808080
Inverted#7F7F7F
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.95:1WCAG large text: AA
Contrast with black, large text5.32:1WCAG large text: AAA
Named colours
Colour harmonies
Complementary#808080
Analogous#808080, #808080
Triadic#808080, #808080
Split complementary#808080, #808080
Tetradic#808080, #808080, #808080
Tints, shades & saturation
Channel breakdown
R128
G128
B128
Red128 (50.2%)
Green128 (50.2%)
Blue128 (50.2%)
Hue0°
Saturation (HSL)0%
Lightness50.2%
Dominant channelNone: the channels are equal (a neutral grey)
Hex per channelR 80 · G 80 · B 80
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Harmonies
Similar named colours
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