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Number

814

  • Positive
  • Even
  • Composite
  • 3 digits

814 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 4.

Number properties

ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value814
Digit count3
Digit sum13
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 11 × 37
Distinct prime factors32, 11, 37
Number of divisors8
Sum of divisors σ(n)1,368
Aliquot sum554sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)360integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 11, 22, 37, 74, 407, 8148 in total

Arithmetic

Previous number813
Next number815
Double1,628
Half407
Square662,596
Cube539,353,144
Square root28.530685235≈irrational, shown to 9 decimal places
Cube root9.337016687≈
Negation-814
Reciprocal0.0012285012≈
814 factorial3863704539062853635029485669767146503964… (2,018 digits)

Representations

Decimal814
Binary110010111010 bits
Octal1456
Hexadecimal32E
Base 36MM
Roman numeralDCCCXIV
In wordseight hundred and fourteen
Ordinaleight hundred and fourteenth
Scientific notation8.14 × 10^2
Engineering notation814

Nearest landmarks

Next prime821+7
Previous prime811−3
Distance to nearest prime3
Nearest square below784
Nearest square above841

Powers & multiples

814 to the power 2662,596
814 to the power 3539,353,144
814 to the power 4439,033,459,216
814 to the power 5357,373,235,801,824
First ten multiples814, 1,628, 2,442, 3,256, 4,070, 4,884, 5,698, 6,512, 7,326, 8,140
Powers of twoBetween 2^9 (512) and 2^10 (1,024)

Divisibility tests

Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5No, remainder 4
Divisible by 6No, remainder 4
Divisible by 7No, remainder 2
Divisible by 8No, remainder 6
Divisible by 9No, remainder 4
Divisible by 10No, remainder 4
Divisible by 11Yes
Divisible by 12No, remainder 10
Divisible by 100No, remainder 14

Collatz (3n + 1) trajectory

Steps to reach 141the total stopping time
Highest value reached2,7523× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps814 → 407 → 1,222 → 611 → 1,834 → 917 → 2,752 → 1,376 → 688 → 344 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage81,400%
814% as a decimal8.14
814% of 100814
814% of 1,0008,140
As a fraction of 100814/100

Read another way

As seconds13 minutes and 34 seconds
As bytes814 B
As a 24-bit colour#00032E

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Neighbouring numbers

Nearby primes

Also reads as

#881144 (colour)

  • #881144
  • Red
  • Dark
  • Nearest: Brown

#881144 is a red with RGB values 136, 17, 68 and HSL 334°, 78%, 30%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Brown.

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Colour values

#881144#881144
HEX#881144
HEX (short)#814
RGBrgb(136, 17, 68)
RGB (0–1)0.5333, 0.0667, 0.2667
RGB percentages53.3%, 6.7%, 26.7%
HSLhsl(334.3, 77.8%, 30%)
HSV / HSBhsv(334.3, 87.5%, 53.3%)
CMYK0%, 87.5%, 50%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,917,316
CSS custom property--colour: #881144;

Brightness & contrast

Relative luminance0.06052WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.5:1
Contrast with white9.5:1WCAG normal text: AAA
Contrast with black2.21:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#77EEBB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#323745no red cones; affects about 1% of men; ΔE 50.4 from the original
Deuteranopia#514E41no green cones; the most common form, about 1% of men; ΔE 52 from the original
Tritanopia#950029no blue cones; rare, and affects men and women equally; ΔE 20.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.5:1WCAG large text: AAA
Contrast with black, large text2.21:1WCAG large text: Fail

Named colours

Brown · ΔE 29.4Medium violet red · ΔE 31.1Pale violetred · ΔE 31.4Indian red · ΔE 31.5Maroon · ΔE 36.1Firebrick · ΔE 37.1
Nearest named CSS colourBrown (#A52A2A)ΔE 29.38, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#118855
Analogous#881180, #881911
Triadic#448811, #114488
Split complementary#118819, #118088
Tetradic#808811, #118855, #191188

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EE77AA
Lighter +30%#E84A8E
Lighter +20%#E31C71
Lighter +10%#B5175B
Darker −10%#5B0B2D
Darker −20%#2D0617
Darker −30%#000000
Darker −40%#000000
More saturated +25%#990042
Less saturated −25%#752447

Channel breakdown

R136
G17
B68
Red136 (53.3%)
Green17 (6.7%)
Blue68 (26.7%)
Hue334.29°
Saturation (HSL)77.78%
Lightness30%
Dominant channelRed
Hex per channelR 88 · G 11 · B 44

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