Number
439
- Positive
- Odd
- Prime
- 3 digits
439 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 7.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value439
Digit count3
Digit sum16
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation439
Distinct prime factors1439
Number of divisors2
Sum of divisors σ(n)440
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)438integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 4392 in total
Arithmetic
Representations
Decimal439
Binary1101101119 bits
Octal667
Hexadecimal1B7
Base 36C7
Roman numeralCDXXXIX
In wordsfour hundred and thirty-nine
Ordinalfour hundred and thirty-ninth
Scientific notation4.39 × 10^2
Engineering notation439
Nearest landmarks
Powers & multiples
439 to the power 2192,721
439 to the power 384,604,519
439 to the power 437,141,383,841
439 to the power 516,305,067,506,199
First ten multiples439, 878, 1,317, 1,756, 2,195, 2,634, 3,073, 3,512, 3,951, 4,390
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7No, remainder 5
Divisible by 8No, remainder 7
Divisible by 9No, remainder 7
Divisible by 10No, remainder 9
Divisible by 11No, remainder 10
Divisible by 12No, remainder 7
Divisible by 100No, remainder 39
Collatz (3n + 1) trajectory
Steps to reach 153the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps439 → 1,318 → 659 → 1,978 → 989 → 2,968 → 1,484 → 742 → 371 → 1,114 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage43,900%
439% as a decimal4.39
439% of 100439
439% of 1,0004,390
As a fraction of 100439/100
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Derived from 439
Other readings
Also reads as
#443399 (colour)
- #443399
- Blue
- Dark
- Nearest: Rebecca purple
#443399 is a blue with RGB values 68, 51, 153 and HSL 250°, 50%, 40%. It is a dark colour, so white text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.
Colour values
#443399#443399
HEX#443399
HEX (short)#439
RGBrgb(68, 51, 153)
RGB (0–1)0.2667, 0.2, 0.6
RGB percentages26.7%, 20%, 60%
HSLhsl(250, 50%, 40%)
HSV / HSBhsv(250, 66.7%, 60%)
CMYK55.6%, 66.7%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,469,657
CSS custom property--colour: #443399;
Brightness & contrast
Relative luminance0.05897WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.64:1
Contrast with white9.64:1WCAG normal text: AAA
Contrast with black2.18:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#BBCC66
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.64:1WCAG large text: AAA
Contrast with black, large text2.18:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#889933
Analogous#335599, #773399
Triadic#994433, #339944
Split complementary#997733, #559933
Tetradic#993355, #889933, #339977
Tints, shades & saturation
Channel breakdown
R68
G51
B153
Red68 (26.7%)
Green51 (20%)
Blue153 (60%)
Hue250°
Saturation (HSL)50%
Lightness40%
Dominant channelBlue
Hex per channelR 44 · G 33 · B 99
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Harmonies
Similar named colours
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