Number
489
- Positive
- Odd
- Composite
- 3 digits
489 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 3.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value489
Digit count3
Digit sum21
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3 × 163
Distinct prime factors23, 163
Number of divisors4
Sum of divisors σ(n)656
Aliquot sum167sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)324integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 3, 163, 4894 in total
Arithmetic
Representations
Decimal489
Binary1111010019 bits
Octal751
Hexadecimal1E9
Base 36DL
Roman numeralCDLXXXIX
In wordsfour hundred and eighty-nine
Ordinalfour hundred and eighty-ninth
Scientific notation4.89 × 10^2
Engineering notation489
Nearest landmarks
Powers & multiples
489 to the power 2239,121
489 to the power 3116,930,169
489 to the power 457,178,852,641
489 to the power 527,960,458,941,449
First ten multiples489, 978, 1,467, 1,956, 2,445, 2,934, 3,423, 3,912, 4,401, 4,890
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 1
Divisible by 5No, remainder 4
Divisible by 6No, remainder 3
Divisible by 7No, remainder 6
Divisible by 8No, remainder 1
Divisible by 9No, remainder 3
Divisible by 10No, remainder 9
Divisible by 11No, remainder 5
Divisible by 12No, remainder 9
Divisible by 100No, remainder 89
Collatz (3n + 1) trajectory
Steps to reach 148the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps489 → 1,468 → 734 → 367 → 1,102 → 551 → 1,654 → 827 → 2,482 → 1,241 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage48,900%
489% as a decimal4.89
489% of 100489
489% of 1,0004,890
As a fraction of 100489/100
Read another way
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Derived from 489
Other readings
Also reads as
#448899 (colour)
- #448899
- Cyan
- Dark
- Nearest: Cadetblue
#448899 is a cyan with RGB values 68, 136, 153 and HSL 192°, 38%, 43%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Cadetblue.
Colour values
#448899#448899
HEX#448899
HEX (short)#489
RGBrgb(68, 136, 153)
RGB (0–1)0.2667, 0.5333, 0.6
RGB percentages26.7%, 53.3%, 60%
HSLhsl(192, 38.5%, 43.3%)
HSV / HSBhsv(192, 55.6%, 60%)
CMYK55.6%, 11.1%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,491,417
CSS custom property--colour: #448899;
Brightness & contrast
Relative luminance0.21137WCAG 2.x, 0 is black and 1 is white
Perceived brightness122.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.23:1
Contrast with white4.02:1WCAG normal text: Fail
Contrast with black5.23:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#BB7766
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.02:1WCAG large text: AA
Contrast with black, large text5.23:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#995544
Analogous#449980, #445E99
Triadic#994488, #889944
Split complementary#99445E, #998044
Tetradic#804499, #995544, #5E9944
Tints, shades & saturation
Channel breakdown
R68
G136
B153
Red68 (26.7%)
Green136 (53.3%)
Blue153 (60%)
Hue192°
Saturation (HSL)38.46%
Lightness43.33%
Dominant channelBlue
Hex per channelR 44 · G 88 · B 99
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Harmonies
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