Number

770

Positive
Even
Composite
3 digits

770 is an even 3-digit integer and a composite number. It has 16 divisors and a digital root of 5.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value770

Digit count3

Digit sum14

Digital root5repeated digit sum

PalindromicNoreads differently backwards

Happy numberNosquared-digit sums reach 1

Harshad numberYesdivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 5 × 7 × 11

Distinct prime factors42, 5, 7, 11

Number of divisors16

Sum of divisors σ(n)1,728

Aliquot sum958sum of the proper divisors

ClassificationAbundantthe aliquot sum exceeds the number

Euler's totient φ(n)240integers below n that share no factor with it

SquarefreeYesno repeated prime factor

All divisors1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 77016 in total

Arithmetic

Previous number769

Next number771

Double1,540

Half385

Square592,900

Cube456,533,000

Square root27.748873851≈irrational, shown to 9 decimal places

Cube root9.165656454≈

Negation-770

Reciprocal0.0012987013≈

770 factorial1080163792907111973902684252072112847917… (1,891 digits)

Representations

Decimal770

Binary110000001010 bits

Octal1402

Hexadecimal302

Base 36LE

Roman numeralDCCLXX

In wordsseven hundred and seventy

Ordinalseven hundred and seventieth

Scientific notation7.7 × 10^2

Engineering notation770

Nearest landmarks

Next prime773+3

Previous prime769−1

Distance to nearest prime1

Nearest square below729

Nearest square above784

Powers & multiples

770 to the power 2592,900

770 to the power 3456,533,000

770 to the power 4351,530,410,000

770 to the power 5270,678,415,700,000

First ten multiples770, 1,540, 2,310, 3,080, 3,850, 4,620, 5,390, 6,160, 6,930, 7,700

Powers of twoBetween 2^9 (512) and 2^10 (1,024)

Divisibility tests

Divisible by 2Yes

Divisible by 3No, remainder 2

Divisible by 4No, remainder 2

Divisible by 5Yes

Divisible by 6No, remainder 2

Divisible by 7Yes

Divisible by 8No, remainder 2

Divisible by 9No, remainder 5

Divisible by 10Yes

Divisible by 11Yes

Divisible by 12No, remainder 2

Divisible by 100No, remainder 70

Collatz (3n + 1) trajectory

Steps to reach 133the total stopping time

Highest value reached1,1561× the starting value

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

First steps770 → 385 → 1,156 → 578 → 289 → 868 → 434 → 217 → 652 → 326 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage77,000%

770% as a decimal7.7

770% of 100770

770% of 1,0007,700

As a fraction of 100770/100

Read another way

As seconds12 minutes and 50 seconds

As bytes770 B

As a 24-bit colour#000302

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Neighbouring numbers

Derived from 770

Nearby primes

#777700 (colour)

#777700
Yellow
Dark
Nearest: Olive

#777700 is a yellow with RGB values 119, 119, 0 and HSL 60°, 100%, 23%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Olive.

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Colour values

#777700#777700

HEX#777700

HEX (short)#770

RGBrgb(119, 119, 0)

RGB (0–1)0.4667, 0.4667, 0

RGB percentages46.7%, 46.7%, 0%

HSLhsl(60, 100%, 23.3%)

HSV / HSBhsv(60, 100%, 46.7%)

CMYK0%, 0%, 100%, 53.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer7,829,248

CSS custom property--colour: #777700;

Brightness & contrast

Relative luminance0.17116WCAG 2.x, 0 is black and 1 is white

Perceived brightness112 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.75:1

Contrast with white4.75:1WCAG normal text: AA

Contrast with black4.42:1WCAG normal text: Fail

Greyscale equivalent#6E6E6E

Inverted#8888FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#827100no red cones; affects about 1% of men; ΔE 8.6 from the original

Deuteranopia#837411no green cones; the most common form, about 1% of men; ΔE 8.3 from the original

Tritanopia#806E64no blue cones; rare, and affects men and women equally; ΔE 48.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text4.75:1WCAG large text: AAA

Contrast with black, large text4.42:1WCAG large text: AA

Named colours

Olive · ΔE 4.6 Olivedrab · ΔE 17.6 Dark olivegreen · ΔE 24.9 Dark goldenrod · ΔE 26.2 Dark khaki · ΔE 29.1 Goldenrod · ΔE 34

Nearest named CSS colourOlive (#808000)ΔE 4.56, a close match

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#000077

Analogous#773B00, #3B7700

Triadic#007777, #770077

Split complementary#003B77, #3B0077

Tetradic#00773B, #000077, #77003B

Tints, shades & saturation

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

Lighter +40%#FFFF44

Lighter +30%#FFFF11

Lighter +20%#DDDD00

Lighter +10%#AAAA00

Darker −10%#444400

Darker −20%#111100

Darker −30%#000000

Darker −40%#000000

More saturated +25%#777700

Less saturated −25%#68680F

Channel breakdown

R119

G119

Red119 (46.7%)

Green119 (46.7%)

Blue0 (0%)

Hue60°

Saturation (HSL)100%

Lightness23.33%

Dominant channelRed and Green

Hex per channelR 77 · G 77 · B 00

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770

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 770

Nearby primes

Other readings

#777700 (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

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