Recognised as Number
268
- Positive
- Even
- Composite
- 3 digits
268 is an even 3-digit integer and a composite number. It has 6 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value268
Digit count3
Digit sum16
Digit product96
Multiplicative persistence4times the digit product can be taken before one digit is left
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 67
Distinct prime factors22, 67
Number of divisors6
Sum of divisors σ(n)476
Aliquot sum208sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)132integers below n that share no factor with it
Carmichael function λ(n)66the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 132
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 67, 134, 2686 in total
Arithmetic
Representations
Decimal268
Binary1000011009 bits
Octal414
Hexadecimal10C
Base 367G
Roman numeralCCLXVIII
In wordstwo hundred and sixty-eight
Ordinaltwo hundred and sixty-eighth
Scientific notation2.68 × 10^2
Engineering notation268
In other bases
Ternary100221base 3; the most digit-efficient integer base after e — 6 digits
Quinary2033base 5; one hand — 4 digits
Septenary532base 7 — 3 digits
Nonary327base 9; each digit is two ternary digits — 3 digits
Duodecimal1a4base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves — 3 digits
Vigesimald8base 20; hands and feet, and the Mayan and Yoruba systems — 2 digits
Sexagesimal4:28base 60; Babylonian, and still how an hour and a circle are divided — 2 digits
Balanced ternary1010T1digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary100011100base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000000100001100
Bit length9 bitsto write the magnitude
Set bits3the population count, or Hamming weight
Zero bits6within that length
Bit parityodd3 set bits, so odd; not the same as the number itself being even
Highest set bitbit 8worth 256
Lowest set bitbit 22 trailing zeros
Power of twoNo
Bytes201 0c
Gray code110001010n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000000100001100
32-bit00000000000000000000000100001100
64-bit0000000000000000000000000000000000000000000000000000000100001100
One's complement1111111011110011at 16 bits, every bit flipped
Bits reversed0011000010000000at 16 bits
Rotated left by 10000001000011000at 16 bits, wrapping
Shifted left by 11000011000= 536, no wrap
Shifted right by 110000110= 134, discarding the low bit
These bits as a double1.32409593 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
268 to the power 271,824
268 to the power 319,248,832
268 to the power 45,158,686,976
268 to the power 51,382,528,109,568
First ten multiples268, 536, 804, 1,072, 1,340, 1,608, 1,876, 2,144, 2,412, 2,680
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5No, remainder 3
Divisible by 6No, remainder 4
Divisible by 7No, remainder 2
Divisible by 8No, remainder 4
Divisible by 9No, remainder 7
Divisible by 10No, remainder 8
Divisible by 11No, remainder 4
Divisible by 12No, remainder 4
Divisible by 100No, remainder 68
Collatz (3n + 1) trajectory
Steps to reach 129the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps268 → 134 → 67 → 202 → 101 → 304 → 152 → 76 → 38 → 19 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage26,800%
268% as a decimal2.68
268% of 100268
268% of 1,0002,680
As a fraction of 100268/100
Read another way
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Derived from 268
Other readings
Also reads as
#226688 (colour)
- #226688
- Blue
- Dark
- Nearest: Steel blue
#226688 is a blue with RGB values 34, 102, 136 and HSL 200°, 60%, 33%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Steel blue.
Colour values
#226688#226688
HEX#226688
HEX (short)#268
RGBrgb(34, 102, 136)
RGB (0–1)0.1333, 0.4, 0.5333
RGB percentages13.3%, 40%, 53.3%
HSLhsl(200, 60%, 33.3%)
HSV / HSBhsv(200, 75%, 53.3%)
CMYK75%, 25%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,254,472
CSS custom property--colour: #226688;
Brightness & contrast
Relative luminance0.1162WCAG 2.x, 0 is black and 1 is white
Perceived brightness92.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.32:1
Contrast with white6.32:1WCAG normal text: AA
Contrast with black3.32:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#DD9977
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.32:1WCAG large text: AAA
Contrast with black, large text3.32:1WCAG large text: AA
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#884422
Analogous#228877, #223388
Triadic#882266, #668822
Split complementary#882233, #887722
Tetradic#772288, #884422, #338822
Tints, shades & saturation
Channel breakdown
R34
G102
B136
Red34 (13.3%)
Green102 (40%)
Blue136 (53.3%)
Hue200°
Saturation (HSL)60%
Lightness33.33%
Dominant channelBlue
Hex per channelR 22 · G 66 · B 88
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Harmonies
Similar named colours
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