Number

400,002

Positive
Even
Composite
6 digits

400,002 is an even 6-digit integer and a composite number. It has 16 divisors and a digital root of 6.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value400,002

Digit count6

Digit sum6

Digital root6repeated digit sum

PalindromicNoreads differently backwards

Happy numberNosquared-digit sums reach 1

Harshad numberYesdivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 3 × 163 × 409

Distinct prime factors42, 3, 163, 409

Number of divisors16

Sum of divisors σ(n)806,880

Aliquot sum406,878sum of the proper divisors

ClassificationAbundantthe aliquot sum exceeds the number

Euler's totient φ(n)132,192integers below n that share no factor with it

SquarefreeYesno repeated prime factor

All divisors1, 2, 3, 6, 163, 326, 409, 489, 818, 978, 1,227, 2,454, 66,667, 133,334, 200,001, 400,00216 in total

Arithmetic

Previous number400,001

Next number400,003

Double800,004

Half200,001

Square160,001,600,004

Cube64,000,960,004,800,008

Square root632.457113171≈irrational, shown to 9 decimal places

Cube root73.680752774≈

Negation-400,002

Reciprocal0.0000025≈

Representations

Decimal400,002

Binary110000110101000001019 bits

Octal1415202

Hexadecimal61A82

Base 368KN6

Roman numeralNot defined above 3,999there is no agreed standard notation

In wordsfour hundred thousand and two

Ordinalfour hundred thousand and second

Scientific notation4.00002 × 10^5

Engineering notation400.002 × 10^3

Nearest landmarks

Next prime400,009+7

Previous prime399,989−13

Distance to nearest prime7

Nearest square below399,424

Nearest square above400,689

Powers & multiples

400,002 to the power 2160,001,600,004

400,002 to the power 364,000,960,004,800,008

400,002 to the power 425,600,512,003,840,012,800,016

400,002 to the power 510,240,256,002,560,012,800,032,000,032

First ten multiples400,002, 800,004, 1,200,006, 1,600,008, 2,000,010, 2,400,012, 2,800,014, 3,200,016, 3,600,018, 4,000,020

Powers of twoBetween 2^18 (262,144) and 2^19 (524,288)

Divisibility tests

Divisible by 2Yes

Divisible by 3Yes

Divisible by 4No, remainder 2

Divisible by 5No, remainder 2

Divisible by 6Yes

Divisible by 7No, remainder 1

Divisible by 8No, remainder 2

Divisible by 9No, remainder 6

Divisible by 10No, remainder 2

Divisible by 11No, remainder 9

Divisible by 12No, remainder 6

Divisible by 100No, remainder 2

Collatz (3n + 1) trajectory

Steps to reach 1161the total stopping time

Highest value reached600,0041× the starting value

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

First steps400,002 → 200,001 → 600,004 → 300,002 → 150,001 → 450,004 → 225,002 → 112,501 → 337,504 → 168,752 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage40,000,200%

400,002% as a decimal4,000.02

400,002% of 100400,002

400,002% of 1,0004,000,020

As a fraction of 100400,002/100

Read another way

As seconds4 days, 15 hours and 6 minutes

As bytes390.627 KiB

As a 24-bit colour#061A82

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Neighbouring numbers

Derived from 400,002

Nearby primes

#400002 (colour)

#400002
Red
Dark
Nearest: Maroon

#400002 is a red with RGB values 64, 0, 2 and HSL 358°, 100%, 13%. It is a dark colour, so white text on it reaches 17.2:1 contrast (AAA for normal text). The nearest named colour is Maroon.

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Colour values

#400002#400002

HEX#400002

RGBrgb(64, 0, 2)

RGB (0–1)0.251, 0, 0.0078

RGB percentages25.1%, 0%, 0.8%

HSLhsl(358.1, 100%, 12.5%)

HSV / HSBhsv(358.1, 100%, 25.1%)

CMYK0%, 100%, 96.9%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,194,306

CSS custom property--colour: #400002;

Brightness & contrast

Relative luminance0.01094WCAG 2.x, 0 is black and 1 is white

Perceived brightness35 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.23:1

Contrast with white17.23:1WCAG normal text: AAA

Contrast with black1.22:1WCAG normal text: Fail

Greyscale equivalent#0E0E0E

Inverted#BFFFFD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#151201no red cones; affects about 1% of men; ΔE 32.3 from the original

Deuteranopia#252000no green cones; the most common form, about 1% of men; ΔE 32.4 from the original

Tritanopia#480001no blue cones; rare, and affects men and women equally; ΔE 4.8 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text17.23:1WCAG large text: AAA

Contrast with black, large text1.22:1WCAG large text: Fail

Named colours

Maroon · ΔE 33.6 Black · ΔE 34.6 Brown · ΔE 37.7 Saddle brown · ΔE 38.4 Dark red · ΔE 38.7 Sienna · ΔE 40

Nearest named CSS colourMaroon (#800000)ΔE 33.63, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00403E

Analogous#400022, #401E00

Triadic#024000, #000240

Split complementary#00401E, #002240

Tetradic#224000, #00403E, #1E0040

Tints, shades & saturation

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

Lighter +40%#FF0D15

Lighter +30%#D90007

Lighter +20%#A60005

Lighter +10%#730004

Darker −10%#0D0000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#400002

Less saturated −25%#38080A

Channel breakdown

R64

Red64 (25.1%)

Green0 (0%)

Blue2 (0.8%)

Hue358.13°

Saturation (HSL)100%

Lightness12.55%

Dominant channelRed

Hex per channelR 40 · G 00 · B 02

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400,002

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 400,002

Nearby primes

Other readings

#400002 (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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