Number
396
- Positive
- Even
- Composite
- 3 digits
396 is an even 3-digit integer and a composite number. It has 18 divisors and a digital root of 9.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value396
Digit count3
Digit sum18
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 3^2 × 11
Distinct prime factors32, 3, 11
Number of divisors18
Sum of divisors σ(n)1,092
Aliquot sum696sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)120integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 39618 in total
Arithmetic
Representations
Decimal396
Binary1100011009 bits
Octal614
Hexadecimal18C
Base 36B0
Roman numeralCCCXCVI
In wordsthree hundred and ninety-six
Ordinalthree hundred and ninety-sixth
Scientific notation3.96 × 10^2
Engineering notation396
Nearest landmarks
Powers & multiples
396 to the power 2156,816
396 to the power 362,099,136
396 to the power 424,591,257,856
396 to the power 59,738,138,110,976
First ten multiples396, 792, 1,188, 1,584, 1,980, 2,376, 2,772, 3,168, 3,564, 3,960
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5No, remainder 1
Divisible by 6Yes
Divisible by 7No, remainder 4
Divisible by 8No, remainder 4
Divisible by 9Yes
Divisible by 10No, remainder 6
Divisible by 11Yes
Divisible by 12Yes
Divisible by 100No, remainder 96
Collatz (3n + 1) trajectory
Steps to reach 127the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps396 → 198 → 99 → 298 → 149 → 448 → 224 → 112 → 56 → 28 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage39,600%
396% as a decimal3.96
396% of 100396
396% of 1,0003,960
As a fraction of 100396/100
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Derived from 396
Other readings
Also reads as
#339966 (colour)
- #339966
- Cyan
- Dark
- Nearest: Sea green
#339966 is a cyan with RGB values 51, 153, 102 and HSL 150°, 50%, 40%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Sea green.
Colour values
#339966#339966
HEX#339966
HEX (short)#396
RGBrgb(51, 153, 102)
RGB (0–1)0.2, 0.6, 0.4
RGB percentages20%, 60%, 40%
HSLhsl(150, 50%, 40%)
HSV / HSBhsv(150, 66.7%, 60%)
CMYK66.7%, 0%, 33.3%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,381,606
CSS custom property--colour: #339966;
Brightness & contrast
Relative luminance0.24446WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.89:1
Contrast with white3.57:1WCAG normal text: Fail
Contrast with black5.89:1WCAG normal text: AA
Greyscale equivalent#808080
Inverted#CC6699
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.57:1WCAG large text: AA
Contrast with black, large text5.89:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#993366
Analogous#339933, #339999
Triadic#663399, #996633
Split complementary#993399, #993333
Tetradic#333399, #993366, #999933
Tints, shades & saturation
Channel breakdown
R51
G153
B102
Red51 (20%)
Green153 (60%)
Blue102 (40%)
Hue150°
Saturation (HSL)50%
Lightness40%
Dominant channelGreen
Hex per channelR 33 · G 99 · B 66
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Harmonies
Similar named colours
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