Number
108
- Positive
- Even
- Composite
- 3 digits
108 is an even 3-digit integer and a composite number. It has 12 divisors and a digital root of 9.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value108
Digit count3
Digit sum9
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 3^3
Distinct prime factors22, 3
Number of divisors12
Sum of divisors σ(n)280
Aliquot sum172sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)36integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 10812 in total
Arithmetic
Representations
Decimal108
Binary11011007 bits
Octal154
Hexadecimal6C
Base 3630
Roman numeralCVIII
In wordsone hundred and eight
Ordinalone hundred and eighth
Scientific notation1.08 × 10^2
Engineering notation108
Nearest landmarks
Powers & multiples
108 to the power 211,664
108 to the power 31,259,712
108 to the power 4136,048,896
108 to the power 514,693,280,768
First ten multiples108, 216, 324, 432, 540, 648, 756, 864, 972, 1,080
Powers of twoBetween 2^6 (64) and 2^7 (128)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5No, remainder 3
Divisible by 6Yes
Divisible by 7No, remainder 3
Divisible by 8No, remainder 4
Divisible by 9Yes
Divisible by 10No, remainder 8
Divisible by 11No, remainder 9
Divisible by 12Yes
Divisible by 100No, remainder 8
Collatz (3n + 1) trajectory
Steps to reach 1113the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps108 → 54 → 27 → 82 → 41 → 124 → 62 → 31 → 94 → 47 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage10,800%
108% as a decimal1.08
108% of 100108
108% of 1,0001,080
As a fraction of 100108/100
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Derived from 108
Other readings
Also reads as
#110088 (colour)
- #110088
- Blue
- Dark
- Nearest: Dark blue
#110088 is a blue with RGB values 17, 0, 136 and HSL 248°, 100%, 27%. It is a dark colour, so white text on it reaches 15.2:1 contrast (AAA for normal text). The nearest named colour is Dark blue.
Colour values
#110088#110088
HEX#110088
HEX (short)#108
RGBrgb(17, 0, 136)
RGB (0–1)0.0667, 0, 0.5333
RGB percentages6.7%, 0%, 53.3%
HSLhsl(247.5, 100%, 26.7%)
HSV / HSBhsv(247.5, 100%, 53.3%)
CMYK87.5%, 100%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,114,248
CSS custom property--colour: #110088;
Brightness & contrast
Relative luminance0.01897WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.22:1
Contrast with white15.22:1WCAG normal text: AAA
Contrast with black1.38:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#EEFF77
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text15.22:1WCAG large text: AAA
Contrast with black, large text1.38:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#778800
Analogous#003388, #550088
Triadic#881100, #008811
Split complementary#885500, #338800
Tetradic#880033, #778800, #008855
Tints, shades & saturation
Channel breakdown
R17
G0
B136
Red17 (6.7%)
Green0 (0%)
Blue136 (53.3%)
Hue247.5°
Saturation (HSL)100%
Lightness26.67%
Dominant channelBlue
Hex per channelR 11 · G 00 · B 88
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