Number
880
- Positive
- Even
- Composite
- 3 digits
880 is an even 3-digit integer and a composite number. It has 20 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value880
Digit count3
Digit sum16
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^4 × 5 × 11
Distinct prime factors32, 5, 11
Number of divisors20
Sum of divisors σ(n)2,232
Aliquot sum1,352sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)320integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 88020 in total
Arithmetic
Representations
Decimal880
Binary110111000010 bits
Octal1560
Hexadecimal370
Base 36OG
Roman numeralDCCCLXXX
In wordseight hundred and eighty
Ordinaleight hundred and eightieth
Scientific notation8.8 × 10^2
Engineering notation880
Nearest landmarks
Powers & multiples
880 to the power 2774,400
880 to the power 3681,472,000
880 to the power 4599,695,360,000
880 to the power 5527,731,916,800,000
First ten multiples880, 1,760, 2,640, 3,520, 4,400, 5,280, 6,160, 7,040, 7,920, 8,800
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
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 5
Divisible by 8Yes
Divisible by 9No, remainder 7
Divisible by 10Yes
Divisible by 11Yes
Divisible by 12No, remainder 4
Divisible by 100No, remainder 80
Collatz (3n + 1) trajectory
Steps to reach 1116the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps880 → 440 → 220 → 110 → 55 → 166 → 83 → 250 → 125 → 376 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage88,000%
880% as a decimal8.8
880% of 100880
880% of 1,0008,800
As a fraction of 100880/100
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Derived from 880
Other readings
Also reads as
#888800 (colour)
- #888800
- Yellow
- Dark
- Nearest: Olive
#888800 is a yellow with RGB values 136, 136, 0 and HSL 60°, 100%, 27%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Olive.
Colour values
#888800#888800
HEX#888800
HEX (short)#880
RGBrgb(136, 136, 0)
RGB (0–1)0.5333, 0.5333, 0
RGB percentages53.3%, 53.3%, 0%
HSLhsl(60, 100%, 26.7%)
HSV / HSBhsv(60, 100%, 53.3%)
CMYK0%, 0%, 100%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,947,712
CSS custom property--colour: #888800;
Brightness & contrast
Relative luminance0.22843WCAG 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 5.57:1
Contrast with white3.77:1WCAG normal text: Fail
Contrast with black5.57:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#7777FF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.77:1WCAG large text: AA
Contrast with black, large text5.57:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#000088
Analogous#884400, #448800
Triadic#008888, #880088
Split complementary#004488, #440088
Tetradic#008844, #000088, #880044
Tints, shades & saturation
Channel breakdown
R136
G136
B0
Red136 (53.3%)
Green136 (53.3%)
Blue0 (0%)
Hue60°
Saturation (HSL)100%
Lightness26.67%
Dominant channelRed and Green
Hex per channelR 88 · G 88 · B 00
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Harmonies
Similar named colours
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