Number

1,340

Positive
Even
Composite
4 digits

1,340 is an even 4-digit integer and a composite number. It has 12 divisors and a digital root of 8.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value1,340

Digit count4

Digit sum8

Digital root8repeated digit sum

PalindromicNoreads differently backwards

Happy numberNosquared-digit sums reach 1

Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2^2 × 5 × 67

Distinct prime factors32, 5, 67

Number of divisors12

Sum of divisors σ(n)2,856

Aliquot sum1,516sum of the proper divisors

ClassificationAbundantthe aliquot sum exceeds the number

Euler's totient φ(n)528integers below n that share no factor with it

SquarefreeNohas a repeated prime factor

All divisors1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1,34012 in total

Arithmetic

Previous number1,339

Next number1,341

Double2,680

Half670

Square1,795,600

Cube2,406,104,000

Square root36.606010435≈irrational, shown to 9 decimal places

Cube root11.024737714≈

Negation-1,340

Reciprocal0.0007462687≈

Representations

Decimal1,340

Binary1010011110011 bits

Octal2474

Hexadecimal53C

Base 36118

Roman numeralMCCCXL

In wordsone thousand, three hundred and forty

Ordinalone thousand, three hundred and fortieth

Scientific notation1.34 × 10^3

Engineering notation1.34 × 10^3

Nearest landmarks

Next prime1,361+21

Previous prime1,327−13

Distance to nearest prime13

Nearest square below1,296

Nearest square above1,369

Powers & multiples

1,340 to the power 21,795,600

1,340 to the power 32,406,104,000

1,340 to the power 43,224,179,360,000

1,340 to the power 54,320,400,342,400,000

First ten multiples1,340, 2,680, 4,020, 5,360, 6,700, 8,040, 9,380, 10,720, 12,060, 13,400

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

Divisibility tests

Divisible by 2Yes

Divisible by 3No, remainder 2

Divisible by 4Yes

Divisible by 5Yes

Divisible by 6No, remainder 2

Divisible by 7No, remainder 3

Divisible by 8No, remainder 4

Divisible by 9No, remainder 8

Divisible by 10Yes

Divisible by 11No, remainder 9

Divisible by 12No, remainder 8

Divisible by 100No, remainder 40

Collatz (3n + 1) trajectory

Steps to reach 170the total stopping time

Highest value reached9,2326× the starting value

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

First steps1,340 → 670 → 335 → 1,006 → 503 → 1,510 → 755 → 2,266 → 1,133 → 3,400 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage134,000%

1,340% as a decimal13.4

1,340% of 1001,340

1,340% of 1,00013,400

As a fraction of 1001,340/100

Read another way

As seconds22 minutes and 20 seconds

As bytes1.309 KiB

As a year1340 AD

As a 24-bit colour#00053C

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Neighbouring numbers

Derived from 1,340

Nearby primes

1340 (year)

Leap year
366 days
14th century
Dragon

1340 was a leap year of 366 days. It began on a Friday and ended on a Saturday. Easter Sunday fell on 27 March.

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Structure of the year

Leap yearYesdivisible by 4, and by 400 if divisible by 100

Days in the year366

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

Days in February29

1 January fell on aFriday

31 December fell on aSaturday

Century14th century

Decade1340s

Chinese zodiacDragon

Easter Sunday27 March

Months of 1340

January31 days, starts Friday

February29 days, starts Monday

March31 days, starts Tuesday

April30 days, starts Friday

May31 days, starts Sunday

June30 days, starts Wednesday

July31 days, starts Friday

August31 days, starts Monday

September30 days, starts Thursday

October31 days, starts Saturday

November30 days, starts Tuesday

December31 days, starts Thursday

Time references

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

Unix timestamp at the start-19,880,899,200

Unix timestamp at the end-19,849,276,801

Years from now686 years ago

Days from today250,809 days since 1 January

The number 1340

As a number1,340

In wordsone thousand, three hundred and forty

Roman numeralsMCCCXL

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Neighbouring years

Key dates

Also reads as

#113344 (colour)

#113344
Blue
Dark
Nearest: Dark slate grey

#113344 is a blue with RGB values 17, 51, 68 and HSL 200°, 60%, 17%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

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Colour values

#113344#113344

HEX#113344

HEX (short)#134

RGBrgb(17, 51, 68)

RGB (0–1)0.0667, 0.2, 0.2667

RGB percentages6.7%, 20%, 26.7%

HSLhsl(200, 60%, 16.7%)

HSV / HSBhsv(200, 75%, 26.7%)

CMYK75%, 25%, 0%, 73.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,127,236

CSS custom property--colour: #113344;

Brightness & contrast

Relative luminance0.02904WCAG 2.x, 0 is black and 1 is white

Perceived brightness46.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13.28:1

Contrast with white13.28:1WCAG normal text: AAA

Contrast with black1.58:1WCAG normal text: Fail

Greyscale equivalent#2D2D2D

Inverted#EECCBB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2B3245no red cones; affects about 1% of men; ΔE 8.5 from the original

Deuteranopia#242D44no green cones; the most common form, about 1% of men; ΔE 9.3 from the original

Tritanopia#003839no blue cones; rare, and affects men and women equally; ΔE 13.5 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text13.28:1WCAG large text: AAA

Contrast with black, large text1.58:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 16.7 Black · ΔE 24.9 Dim grey · ΔE 29.1 Slate grey · ΔE 33.6 Light slate grey · ΔE 36.6 Teal · ΔE 37.2

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 16.71, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#442211

Analogous#11443C, #111944

Triadic#441133, #334411

Split complementary#44111A, #443B11

Tetradic#3B1144, #442211, #194411

Tints, shades & saturation

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

Lighter +40%#4EA7D3

Lighter +30%#308FBE

Lighter +20%#257096

Lighter +10%#1B526D

Darker −10%#07141B

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#06374F

Less saturated −25%#1C2F39

Channel breakdown

R17

G51

B68

Red17 (6.7%)

Green51 (20%)

Blue68 (26.7%)

Hue200°

Saturation (HSL)60%

Lightness16.67%

Dominant channelBlue

Hex per channelR 11 · G 33 · B 44

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1,340

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 1,340

Nearby primes

Other readings

1340 (year)

Structure of the year

Months of 1340

Time references

The number 1340

Keep nerding

Neighbouring years

Key dates

#113344 (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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