Number
395
- Positive
- Odd
- Composite
- 3 digits
395 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 8.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value395
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 factorisation5 × 79
Distinct prime factors25, 79
Number of divisors4
Sum of divisors σ(n)480
Aliquot sum85sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)312integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 5, 79, 3954 in total
Arithmetic
Representations
Decimal395
Binary1100010119 bits
Octal613
Hexadecimal18B
Base 36AZ
Roman numeralCCCXCV
In wordsthree hundred and ninety-five
Ordinalthree hundred and ninety-fifth
Scientific notation3.95 × 10^2
Engineering notation395
Nearest landmarks
Powers & multiples
395 to the power 2156,025
395 to the power 361,629,875
395 to the power 424,343,800,625
395 to the power 59,615,801,246,875
First ten multiples395, 790, 1,185, 1,580, 1,975, 2,370, 2,765, 3,160, 3,555, 3,950
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5Yes
Divisible by 6No, remainder 5
Divisible by 7No, remainder 3
Divisible by 8No, remainder 3
Divisible by 9No, remainder 8
Divisible by 10No, remainder 5
Divisible by 11No, remainder 10
Divisible by 12No, remainder 11
Divisible by 100No, remainder 95
Collatz (3n + 1) trajectory
Steps to reach 176the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps395 → 1,186 → 593 → 1,780 → 890 → 445 → 1,336 → 668 → 334 → 167 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage39,500%
395% as a decimal3.95
395% of 100395
395% of 1,0003,950
As a fraction of 100395/100
Read another way
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Derived from 395
Other readings
Also reads as
#339955 (colour)
- #339955
- Green
- Dark
- Nearest: Sea green
#339955 is a green with RGB values 51, 153, 85 and HSL 140°, 50%, 40%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Sea green.
Colour values
#339955#339955
HEX#339955
HEX (short)#395
RGBrgb(51, 153, 85)
RGB (0–1)0.2, 0.6, 0.3333
RGB percentages20%, 60%, 33.3%
HSLhsl(140, 50%, 40%)
HSV / HSBhsv(140, 66.7%, 60%)
CMYK66.7%, 0%, 44.4%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,381,589
CSS custom property--colour: #339955;
Brightness & contrast
Relative luminance0.24142WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.83:1
Contrast with white3.6:1WCAG normal text: Fail
Contrast with black5.83:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#CC66AA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.6:1WCAG large text: AA
Contrast with black, large text5.83:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#993377
Analogous#449933, #339988
Triadic#553399, #995533
Split complementary#883399, #993344
Tetradic#334499, #993377, #998833
Tints, shades & saturation
Channel breakdown
R51
G153
B85
Red51 (20%)
Green153 (60%)
Blue85 (33.3%)
Hue140°
Saturation (HSL)50%
Lightness40%
Dominant channelGreen
Hex per channelR 33 · G 99 · B 55
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Harmonies
Similar named colours
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