Number
890
- Positive
- Even
- Composite
- 3 digits
890 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 8.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value890
Digit count3
Digit sum17
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 89
Distinct prime factors32, 5, 89
Number of divisors8
Sum of divisors σ(n)1,620
Aliquot sum730sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)352integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 89, 178, 445, 8908 in total
Arithmetic
Representations
Decimal890
Binary110111101010 bits
Octal1572
Hexadecimal37A
Base 36OQ
Roman numeralDCCCXC
In wordseight hundred and ninety
Ordinaleight hundred and ninetieth
Scientific notation8.9 × 10^2
Engineering notation890
Nearest landmarks
Powers & multiples
890 to the power 2792,100
890 to the power 3704,969,000
890 to the power 4627,422,410,000
890 to the power 5558,405,944,900,000
First ten multiples890, 1,780, 2,670, 3,560, 4,450, 5,340, 6,230, 7,120, 8,010, 8,900
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 2
Divisible by 7No, remainder 1
Divisible by 8No, remainder 2
Divisible by 9No, remainder 8
Divisible by 10Yes
Divisible by 11No, remainder 10
Divisible by 12No, remainder 2
Divisible by 100No, remainder 90
Collatz (3n + 1) trajectory
Steps to reach 172the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps890 → 445 → 1,336 → 668 → 334 → 167 → 502 → 251 → 754 → 377 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage89,000%
890% as a decimal8.9
890% of 100890
890% of 1,0008,900
As a fraction of 100890/100
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Derived from 890
Other readings
Also reads as
#889900 (colour)
- #889900
- Yellow
- Dark
- Nearest: Olive
#889900 is a yellow with RGB values 136, 153, 0 and HSL 67°, 100%, 30%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Olive.
Colour values
#889900#889900
HEX#889900
HEX (short)#890
RGBrgb(136, 153, 0)
RGB (0–1)0.5333, 0.6, 0
RGB percentages53.3%, 60%, 0%
HSLhsl(66.7, 100%, 30%)
HSV / HSBhsv(66.7, 100%, 60%)
CMYK11.1%, 0%, 100%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,952,064
CSS custom property--colour: #889900;
Brightness & contrast
Relative luminance0.28017WCAG 2.x, 0 is black and 1 is white
Perceived brightness138.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.6:1
Contrast with white3.18:1WCAG normal text: Fail
Contrast with black6.6:1WCAG normal text: AA
Greyscale equivalent#8A8A8A
Inverted#7766FF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.18:1WCAG large text: AA
Contrast with black, large text6.6:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#110099
Analogous#995E00, #3B9900
Triadic#008899, #990088
Split complementary#003B99, #5E0099
Tetradic#00995E, #110099, #99003B
Tints, shades & saturation
Channel breakdown
R136
G153
B0
Red136 (53.3%)
Green153 (60%)
Blue0 (0%)
Hue66.67°
Saturation (HSL)100%
Lightness30%
Dominant channelGreen
Hex per channelR 88 · G 99 · B 00
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Harmonies
Similar named colours
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