Number
540
- Positive
- Even
- Composite
- 3 digits
540 is an even 3-digit integer and a composite number. It has 24 divisors and a digital root of 9.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value540
Digit count3
Digit sum9
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 × 3^3 × 5
Distinct prime factors32, 3, 5
Number of divisors24
Sum of divisors σ(n)1,680
Aliquot sum1,140sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)144integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 54024 in total
Arithmetic
Representations
Decimal540
Binary100001110010 bits
Octal1034
Hexadecimal21C
Base 36F0
Roman numeralDXL
In wordsfive hundred and forty
Ordinalfive hundred and fortieth
Scientific notation5.4 × 10^2
Engineering notation540
Nearest landmarks
Powers & multiples
540 to the power 2291,600
540 to the power 3157,464,000
540 to the power 485,030,560,000
540 to the power 545,916,502,400,000
First ten multiples540, 1,080, 1,620, 2,160, 2,700, 3,240, 3,780, 4,320, 4,860, 5,400
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6Yes
Divisible by 7No, remainder 1
Divisible by 8No, remainder 4
Divisible by 9Yes
Divisible by 10Yes
Divisible by 11No, remainder 1
Divisible by 12Yes
Divisible by 100No, remainder 40
Collatz (3n + 1) trajectory
Steps to reach 143the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps540 → 270 → 135 → 406 → 203 → 610 → 305 → 916 → 458 → 229 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage54,000%
540% as a decimal5.4
540% of 100540
540% of 1,0005,400
As a fraction of 100540/100
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Derived from 540
Other readings
Also reads as
#554400 (colour)
- #554400
- Yellow
- Dark
- Nearest: Dark olivegreen
#554400 is a yellow with RGB values 85, 68, 0 and HSL 48°, 100%, 17%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#554400#554400
HEX#554400
HEX (short)#540
RGBrgb(85, 68, 0)
RGB (0–1)0.3333, 0.2667, 0
RGB percentages33.3%, 26.7%, 0%
HSLhsl(48, 100%, 16.7%)
HSV / HSBhsv(48, 100%, 33.3%)
CMYK0%, 20%, 100%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,587,968
CSS custom property--colour: #554400;
Brightness & contrast
Relative luminance0.06066WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.49:1
Contrast with white9.49:1WCAG normal text: AAA
Contrast with black2.21:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#AABBFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.49:1WCAG large text: AAA
Contrast with black, large text2.21:1WCAG large text: Fail
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#001155
Analogous#551900, #3B5500
Triadic#005544, #440055
Split complementary#003C55, #190055
Tetradic#005519, #001155, #55003C
Tints, shades & saturation
Channel breakdown
R85
G68
B0
Red85 (33.3%)
Green68 (26.7%)
Blue0 (0%)
Hue48°
Saturation (HSL)100%
Lightness16.67%
Dominant channelRed
Hex per channelR 55 · G 44 · B 00
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Harmonies
Similar named colours
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