Number

1,370

Positive
Even
Composite
4 digits

1,370 is an even 4-digit integer and a composite number. It has 8 divisors and a digital root of 2.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value1,370

Digit count4

Digit sum11

Digital root2repeated digit sum

PalindromicNoreads differently backwards

Happy numberNosquared-digit sums reach 1

Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 5 × 137

Distinct prime factors32, 5, 137

Number of divisors8

Sum of divisors σ(n)2,484

Aliquot sum1,114sum of the proper divisors

ClassificationDeficientthe aliquot sum is less than the number

Euler's totient φ(n)544integers below n that share no factor with it

SquarefreeYesno repeated prime factor

All divisors1, 2, 5, 10, 137, 274, 685, 1,3708 in total

Arithmetic

Previous number1,369

Next number1,371

Double2,740

Half685

Square1,876,900

Cube2,571,353,000

Square root37.013511047≈irrational, shown to 9 decimal places

Cube root11.106405415≈

Negation-1,370

Reciprocal0.000729927≈

Representations

Decimal1,370

Binary1010101101011 bits

Octal2532

Hexadecimal55A

Base 36122

Roman numeralMCCCLXX

In wordsone thousand, three hundred and seventy

Ordinalone thousand, three hundred and seventieth

Scientific notation1.37 × 10^3

Engineering notation1.37 × 10^3

Nearest landmarks

Next prime1,373+3

Previous prime1,367−3

Distance to nearest prime3

Nearest square below1,369

Nearest square above1,444

Powers & multiples

1,370 to the power 21,876,900

1,370 to the power 32,571,353,000

1,370 to the power 43,522,753,610,000

1,370 to the power 54,826,172,445,700,000

First ten multiples1,370, 2,740, 4,110, 5,480, 6,850, 8,220, 9,590, 10,960, 12,330, 13,700

Powers of twoBetween 2^10 (1,024) and 2^11 (2,048)

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 7No, remainder 5

Divisible by 8No, remainder 2

Divisible by 9No, remainder 2

Divisible by 10Yes

Divisible by 11No, remainder 6

Divisible by 12No, remainder 2

Divisible by 100No, remainder 70

Collatz (3n + 1) trajectory

Steps to reach 1127the total stopping time

Highest value reached9,2326× the starting value

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

First steps1,370 → 685 → 2,056 → 1,028 → 514 → 257 → 772 → 386 → 193 → 580 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage137,000%

1,370% as a decimal13.7

1,370% of 1001,370

1,370% of 1,00013,700

As a fraction of 1001,370/100

Read another way

As seconds22 minutes and 50 seconds

As bytes1.338 KiB

As a year1370 AD

As a 24-bit colour#00055A

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Neighbouring numbers

Derived from 1,370

Nearby primes

1370 (year)

Common year
365 days
14th century
Dog

1370 was a common year of 365 days. It began on a Monday and ended on a Monday. Easter Sunday fell on 22 April.

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Structure of the year

Leap yearNonot divisible by 4

Days in the year365

Weeks in the year52ISO 8601 weeks; 28 December is always in the final week

Days in February28

1 January fell on aMonday

31 December fell on aMonday

Century14th century

Decade1370s

Chinese zodiacDog

Easter Sunday22 April

Months of 1370

January31 days, starts Monday

February28 days, starts Thursday

March31 days, starts Thursday

April30 days, starts Sunday

May31 days, starts Tuesday

June30 days, starts Friday

July31 days, starts Sunday

August31 days, starts Wednesday

September30 days, starts Saturday

October31 days, starts Monday

November30 days, starts Thursday

December31 days, starts Saturday

Time references

These values depend on today’s date and change daily.

Unix timestamp at the start-18,934,128,000

Unix timestamp at the end-18,902,592,001

Years from now656 years ago

Days from today239,851 days since 1 January

The number 1370

As a number1,370

In wordsone thousand, three hundred and seventy

Roman numeralsMCCCLXX

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Neighbouring years

Key dates

Also reads as

#113377 (colour)

#113377
Blue
Dark
Nearest: Dark slateblue

#113377 is a blue with RGB values 17, 51, 119 and HSL 220°, 75%, 27%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

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Colour values

#113377#113377

HEX#113377

HEX (short)#137

RGBrgb(17, 51, 119)

RGB (0–1)0.0667, 0.2, 0.4667

RGB percentages6.7%, 20%, 46.7%

HSLhsl(220, 75%, 26.7%)

HSV / HSBhsv(220, 85.7%, 46.7%)

CMYK85.7%, 57.1%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,127,287

CSS custom property--colour: #113377;

Brightness & contrast

Relative luminance0.03819WCAG 2.x, 0 is black and 1 is white

Perceived brightness56.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.91:1

Contrast with white11.91:1WCAG normal text: AAA

Contrast with black1.76:1WCAG normal text: Fail

Greyscale equivalent#313131

Inverted#EECC88

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#003C79no red cones; affects about 1% of men; ΔE 7.8 from the original

Deuteranopia#003376no green cones; the most common form, about 1% of men; ΔE 1.8 from the original

Tritanopia#00444Fno blue cones; rare, and affects men and women equally; ΔE 42.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.91:1WCAG large text: AAA

Contrast with black, large text1.76:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.9 Midnight blue · ΔE 19 Rebecca purple · ΔE 29.3 Slate blue · ΔE 33.9 Royal blue · ΔE 35.4 Steel blue · ΔE 36.9

Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.93, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#775511

Analogous#116677, #221177

Triadic#771133, #337711

Split complementary#772211, #667711

Tetradic#771166, #775511, #117722

Tints, shades & saturation

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

Lighter +40%#6A95EA

Lighter +30%#3E75E3

Lighter +20%#1E59D0

Lighter +10%#1746A4

Darker −10%#0B204A

Darker −20%#040D1E

Darker −30%#000000

Darker −40%#000000

More saturated +25%#002D88

Less saturated −25%#223966

Channel breakdown

R17

G51

B119

Red17 (6.7%)

Green51 (20%)

Blue119 (46.7%)

Hue220°

Saturation (HSL)75%

Lightness26.67%

Dominant channelBlue

Hex per channelR 11 · G 33 · B 77

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1,370

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 1,370

Nearby primes

Other readings

1370 (year)

Structure of the year

Months of 1370

Time references

The number 1370

Keep nerding

Neighbouring years

Key dates

#113377 (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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