Number
338
- Positive
- Even
- Composite
- 3 digits
338 is an even 3-digit integer and a composite number. It has 6 divisors and a digital root of 5.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value338
Digit count3
Digit sum14
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 13^2
Distinct prime factors22, 13
Number of divisors6
Sum of divisors σ(n)549
Aliquot sum211sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)156integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 13, 26, 169, 3386 in total
Arithmetic
Representations
Decimal338
Binary1010100109 bits
Octal522
Hexadecimal152
Base 369E
Roman numeralCCCXXXVIII
In wordsthree hundred and thirty-eight
Ordinalthree hundred and thirty-eighth
Scientific notation3.38 × 10^2
Engineering notation338
Nearest landmarks
Powers & multiples
338 to the power 2114,244
338 to the power 338,614,472
338 to the power 413,051,691,536
338 to the power 54,411,471,739,168
First ten multiples338, 676, 1,014, 1,352, 1,690, 2,028, 2,366, 2,704, 3,042, 3,380
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5No, remainder 3
Divisible by 6No, remainder 2
Divisible by 7No, remainder 2
Divisible by 8No, remainder 2
Divisible by 9No, remainder 5
Divisible by 10No, remainder 8
Divisible by 11No, remainder 8
Divisible by 12No, remainder 2
Divisible by 100No, remainder 38
Collatz (3n + 1) trajectory
Steps to reach 150the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps338 → 169 → 508 → 254 → 127 → 382 → 191 → 574 → 287 → 862 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage33,800%
338% as a decimal3.38
338% of 100338
338% of 1,0003,380
As a fraction of 100338/100
Read another way
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Derived from 338
Other readings
Also reads as
#333388 (colour)
- #333388
- Blue
- Dark
- Nearest: Dark slateblue
#333388 is a blue with RGB values 51, 51, 136 and HSL 240°, 45%, 37%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.
Colour values
#333388#333388
HEX#333388
HEX (short)#338
RGBrgb(51, 51, 136)
RGB (0–1)0.2, 0.2, 0.5333
RGB percentages20%, 20%, 53.3%
HSLhsl(240, 45.5%, 36.7%)
HSV / HSBhsv(240, 62.5%, 53.3%)
CMYK62.5%, 62.5%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,355,528
CSS custom property--colour: #333388;
Brightness & contrast
Relative luminance0.04849WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.66:1
Contrast with white10.66:1WCAG normal text: AAA
Contrast with black1.97:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#CCCC77
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.66:1WCAG large text: AAA
Contrast with black, large text1.97:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#888833
Analogous#335E88, #5E3388
Triadic#883333, #338833
Split complementary#885E33, #5E8833
Tetradic#88335E, #888833, #33885E
Tints, shades & saturation
Channel breakdown
R51
G51
B136
Red51 (20%)
Green51 (20%)
Blue136 (53.3%)
Hue240°
Saturation (HSL)45.45%
Lightness36.67%
Dominant channelBlue
Hex per channelR 33 · G 33 · B 88
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Harmonies
Similar named colours
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