Number
988
- Positive
- Even
- Composite
- 3 digits
988 is an even 3-digit integer and a composite number. It has 12 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value988
Digit count3
Digit sum25
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 13 × 19
Distinct prime factors32, 13, 19
Number of divisors12
Sum of divisors σ(n)1,960
Aliquot sum972sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)432integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 98812 in total
Arithmetic
Representations
Decimal988
Binary111101110010 bits
Octal1734
Hexadecimal3DC
Base 36RG
Roman numeralCMLXXXVIII
In wordsnine hundred and eighty-eight
Ordinalnine hundred and eighty-eighth
Scientific notation9.88 × 10^2
Engineering notation988
Nearest landmarks
Powers & multiples
988 to the power 2976,144
988 to the power 3964,430,272
988 to the power 4952,857,108,736
988 to the power 5941,422,823,431,168
First ten multiples988, 1,976, 2,964, 3,952, 4,940, 5,928, 6,916, 7,904, 8,892, 9,880
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 5No, remainder 3
Divisible by 6No, remainder 4
Divisible by 7No, remainder 1
Divisible by 8No, remainder 4
Divisible by 9No, remainder 7
Divisible by 10No, remainder 8
Divisible by 11No, remainder 9
Divisible by 12No, remainder 4
Divisible by 100No, remainder 88
Collatz (3n + 1) trajectory
Steps to reach 149the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps988 → 494 → 247 → 742 → 371 → 1,114 → 557 → 1,672 → 836 → 418 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage98,800%
988% as a decimal9.88
988% of 100988
988% of 1,0009,880
As a fraction of 100988/100
Read another way
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Derived from 988
Other readings
Also reads as
#998888 (colour)
- #998888
- Grey
- Dark
- Nearest: Gray
#998888 is a grey with RGB values 153, 136, 136 and HSL 0°, 8%, 57%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Gray.
Colour values
#998888#998888
HEX#998888
HEX (short)#988
RGBrgb(153, 136, 136)
RGB (0–1)0.6, 0.5333, 0.5333
RGB percentages60%, 53.3%, 53.3%
HSLhsl(0, 7.7%, 56.7%)
HSV / HSBhsv(0, 11.1%, 60%)
CMYK0%, 11.1%, 11.1%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,061,960
CSS custom property--colour: #998888;
Brightness & contrast
Relative luminance0.26158WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.23:1
Contrast with white3.37:1WCAG normal text: Fail
Contrast with black6.23:1WCAG normal text: AA
Greyscale equivalent#8C8C8C
Inverted#667777
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.37:1WCAG large text: AA
Contrast with black, large text6.23:1WCAG large text: AAA
Named colours
Hue familygrey
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#889999
Analogous#998891, #999188
Triadic#889988, #888899
Split complementary#889991, #889199
Tetradic#919988, #889999, #918899
Tints, shades & saturation
Channel breakdown
R153
G136
B136
Red153 (60%)
Green136 (53.3%)
Blue136 (53.3%)
Hue0°
Saturation (HSL)7.69%
Lightness56.67%
Dominant channelRed
Hex per channelR 99 · G 88 · B 88
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