Number

478

Positive
Even
Composite
3 digits

478 is an even 3-digit integer and a composite number. It has 4 divisors and a digital root of 1.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value478

Digit count3

Digit sum19

Digital root1repeated digit sum

PalindromicNoreads differently backwards

Happy numberYessquared-digit sums reach 1

Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 239

Distinct prime factors22, 239

Number of divisors4

Sum of divisors σ(n)720

Aliquot sum242sum of the proper divisors

ClassificationDeficientthe aliquot sum is less than the number

Euler's totient φ(n)238integers below n that share no factor with it

SquarefreeYesno repeated prime factor

All divisors1, 2, 239, 4784 in total

Arithmetic

Previous number477

Next number479

Double956

Half239

Square228,484

Cube109,215,352

Square root21.863211109≈irrational, shown to 9 decimal places

Cube root7.818845511≈

Negation-478

Reciprocal0.0020920502≈

478 factorial8178088897885239440809453119355093446660… (1,075 digits)

Representations

Decimal478

Binary1110111109 bits

Octal736

Hexadecimal1DE

Base 36DA

Roman numeralCDLXXVIII

In wordsfour hundred and seventy-eight

Ordinalfour hundred and seventy-eighth

Scientific notation4.78 × 10^2

Engineering notation478

Nearest landmarks

Next prime479+1

Previous prime467−11

Distance to nearest prime1

Nearest square below441

Nearest square above484

Powers & multiples

478 to the power 2228,484

478 to the power 3109,215,352

478 to the power 452,204,938,256

478 to the power 524,953,960,486,368

First ten multiples478, 956, 1,434, 1,912, 2,390, 2,868, 3,346, 3,824, 4,302, 4,780

Powers of twoBetween 2^8 (256) and 2^9 (512)

Divisibility tests

Divisible by 2Yes

Divisible by 3No, remainder 1

Divisible by 4No, remainder 2

Divisible by 5No, remainder 3

Divisible by 6No, remainder 4

Divisible by 7No, remainder 2

Divisible by 8No, remainder 6

Divisible by 9No, remainder 1

Divisible by 10No, remainder 8

Divisible by 11No, remainder 5

Divisible by 12No, remainder 10

Divisible by 100No, remainder 78

Collatz (3n + 1) trajectory

Steps to reach 153the total stopping time

Highest value reached9,23219× the starting value

Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven

First steps478 → 239 → 718 → 359 → 1,078 → 539 → 1,618 → 809 → 2,428 → 1,214 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage47,800%

478% as a decimal4.78

478% of 100478

478% of 1,0004,780

As a fraction of 100478/100

Read another way

As seconds7 minutes and 58 seconds

As bytes478 B

As a 24-bit colour#0001DE

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Neighbouring numbers

Derived from 478

Nearby primes

#447788 (colour)

#447788
Cyan
Dark
Nearest: Slate grey

#447788 is a cyan with RGB values 68, 119, 136 and HSL 195°, 33%, 40%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Slate grey.

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Colour values

#447788#447788

HEX#447788

HEX (short)#478

RGBrgb(68, 119, 136)

RGB (0–1)0.2667, 0.4667, 0.5333

RGB percentages26.7%, 46.7%, 53.3%

HSLhsl(195, 33.3%, 40%)

HSV / HSBhsv(195, 50%, 53.3%)

CMYK50%, 12.5%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,487,048

CSS custom property--colour: #447788;

Brightness & contrast

Relative luminance0.162WCAG 2.x, 0 is black and 1 is white

Perceived brightness108.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.95:1

Contrast with white4.95:1WCAG normal text: AA

Contrast with black4.24:1WCAG normal text: Fail

Greyscale equivalent#6D6D6D

Inverted#BB8877

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D7489no red cones; affects about 1% of men; ΔE 14.6 from the original

Deuteranopia#636D88no green cones; the most common form, about 1% of men; ΔE 15 from the original

Tritanopia#207D7Cno blue cones; rare, and affects men and women equally; ΔE 15.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text4.95:1WCAG large text: AAA

Contrast with black, large text4.24:1WCAG large text: AA

Named colours

Slate grey · ΔE 12.2 Light slate grey · ΔE 13.6 Cadetblue · ΔE 17.4 Teal · ΔE 17.8 Dim grey · ΔE 19.2 Dark slate grey · ΔE 19.3

Nearest named CSS colourSlate grey (#708090)ΔE 12.18, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#885544

Analogous#448877, #445588

Triadic#884477, #778844

Split complementary#884455, #887744

Tetradic#774488, #885544, #558844

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#BBD5DD

Lighter +30%#99BFCC

Lighter +20%#77AABB

Lighter +10%#5595AA

Darker −10%#335966

Darker −20%#223C44

Darker −30%#111E22

Darker −40%#000000

More saturated +25%#2B84A2

Less saturated −25%#5E6A6F

Channel breakdown

R68

G119

B136

Red68 (26.7%)

Green119 (46.7%)

Blue136 (53.3%)

Hue195°

Saturation (HSL)33.33%

Lightness40%

Dominant channelBlue

Hex per channelR 44 · G 77 · B 88

Keep nerding

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478

Number properties

Factors & divisors

Arithmetic

Representations

Nearest landmarks

Powers & multiples

Divisibility tests

Collatz (3n + 1) trajectory

As a percentage & fraction

Read another way

Keep nerding

Neighbouring numbers

Derived from 478

Nearby primes

Other readings

#447788 (colour)

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

Nerdulate something else