Recognised as Number
270
- Positive
- Even
- Composite
- 3 digits
270 is an even 3-digit integer and a composite number. It has 16 divisors and a digital root of 9.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value270
Digit count3
Digit sum9
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 3^3 × 5
Distinct prime factors32, 3, 5
Number of divisors16
Sum of divisors σ(n)720
Aliquot sum450sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)72integers below n that share no factor with it
Carmichael function λ(n)36the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 72
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 27016 in total
Arithmetic
Representations
Decimal270
Binary1000011109 bits
Octal416
Hexadecimal10E
Base 367I
Roman numeralCCLXX
In wordstwo hundred and seventy
Ordinaltwo hundred and seventieth
Scientific notation2.7 × 10^2
Engineering notation270
In other bases
Ternary101000base 3; the most digit-efficient integer base after e: 6 digits
Quinary2040base 5; one hand: 4 digits
Septenary534base 7: 3 digits
Nonary330base 9; each digit is two ternary digits: 3 digits
Duodecimal1a6base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimaldabase 20; hands and feet, and the Mayan and Yoruba systems: 2 digits
Sexagesimal4:30base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary101000digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary100010010base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000000100001110
Bit length9 bitsto write the magnitude
Set bits4the population count, or Hamming weight
Zero bits5within that length
Bit parityeven4 set bits, so even; not the same as the number itself being even
Highest set bitbit 8worth 256
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes201 0e
Gray code110001001n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000000100001110
32-bit00000000000000000000000100001110
64-bit0000000000000000000000000000000000000000000000000000000100001110
One's complement1111111011110001at 16 bits, every bit flipped
Bits reversed0111000010000000at 16 bits
Rotated left by 10000001000011100at 16 bits, wrapping
Shifted left by 11000011100= 540, no wrap
Shifted right by 110000111= 135, discarding the low bit
These bits as a double1.33397724 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
270 to the power 272,900
270 to the power 319,683,000
270 to the power 45,314,410,000
270 to the power 51,434,890,700,000
First ten multiples270, 540, 810, 1,080, 1,350, 1,620, 1,890, 2,160, 2,430, 2,700
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6Yes
Divisible by 7No, remainder 4
Divisible by 8No, remainder 6
Divisible by 9Yes
Divisible by 10Yes
Divisible by 11No, remainder 6
Divisible by 12No, remainder 6
Divisible by 100No, remainder 70
Collatz (3n + 1) trajectory
Steps to reach 142the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps270 → 135 → 406 → 203 → 610 → 305 → 916 → 458 → 229 → 688 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage27,000%
270% as a decimal2.7
270% of 100270
270% of 1,0002,700
As a fraction of 100270/100
Read another way
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Derived from 270
Other readings
Also reads as
#227700 (colour)
- #227700
- Green
- Dark
- Nearest: Green
#227700 is a green with RGB values 34, 119, 0 and HSL 103°, 100%, 23%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Green.
Colour values
#227700#227700
HEX#227700
HEX (short)#270
RGBrgb(34, 119, 0)
RGB (0–1)0.1333, 0.4667, 0
RGB percentages13.3%, 46.7%, 0%
HSLhsl(102.9, 100%, 23.3%)
HSV / HSBhsv(102.9, 100%, 46.7%)
CMYK71.4%, 0%, 100%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,258,688
CSS custom property--colour: #227700;
Brightness & contrast
Relative luminance0.13534WCAG 2.x, 0 is black and 1 is white
Perceived brightness93 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.67:1
Contrast with white5.67:1WCAG normal text: AA
Contrast with black3.71:1WCAG normal text: Fail
Greyscale equivalent#5C5C5C
Inverted#DD88FF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.67:1WCAG large text: AAA
Contrast with black, large text3.71:1WCAG large text: AA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#550077
Analogous#5D7700, #00771A
Triadic#002277, #770022
Split complementary#1A0077, #77005D
Tetradic#005D77, #550077, #771A00
Tints, shades & saturation
Channel breakdown
R34
G119
B0
Red34 (13.3%)
Green119 (46.7%)
Blue0 (0%)
Hue102.86°
Saturation (HSL)100%
Lightness23.33%
Dominant channelGreen
Hex per channelR 22 · G 77 · B 00
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Harmonies
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