Number

441

Positive
Odd
Composite
Perfect square
3 digits

441 is an odd 3-digit integer and a composite number. It has 9 divisors and a digital root of 9.

The canonical address for this page is /441.

Number properties

ParityOddnot divisible by 2

SignPositive

PrimalityComposite

Absolute value441

Digit count3

Digit sum9

Digital root9repeated digit sum

PalindromicNoreads differently backwards

Perfect squareYes, 21²

Happy numberNosquared-digit sums reach 1

Harshad numberYesdivisible by its own digit sum

Factors & divisors

Prime factorisation3^2 × 7^2

Distinct prime factors23, 7

Number of divisors9

Sum of divisors σ(n)741

Aliquot sum300sum of the proper divisors

ClassificationDeficientthe aliquot sum is less than the number

Euler's totient φ(n)252integers below n that share no factor with it

SquarefreeNohas a repeated prime factor

All divisors1, 3, 7, 9, 21, 49, 63, 147, 4419 in total

Arithmetic

Previous number440

Next number442

Double882

Half220.5

Square194,481

Cube85,766,121

Square root21exact

Cube root7.611662611≈

Negation-441

Reciprocal0.0022675737≈

441 factorial2482805684832755243723189296194164346189… (977 digits)

Representations

Decimal441

Binary1101110019 bits

Octal671

Hexadecimal1B9

Base 36C9

Roman numeralCDXLI

In wordsfour hundred and forty-one

Ordinalfour hundred and forty-first

Scientific notation4.41 × 10^2

Engineering notation441

Nearest landmarks

Next prime443+2

Previous prime439−2

Distance to nearest prime2

Nearest square below441

Nearest square above484

Powers & multiples

441 to the power 2194,481

441 to the power 385,766,121

441 to the power 437,822,859,361

441 to the power 516,679,880,978,201

First ten multiples441, 882, 1,323, 1,764, 2,205, 2,646, 3,087, 3,528, 3,969, 4,410

Powers of twoBetween 2^8 (256) and 2^9 (512)

Divisibility tests

Divisible by 2No, remainder 1

Divisible by 3Yes

Divisible by 4No, remainder 1

Divisible by 5No, remainder 1

Divisible by 6No, remainder 3

Divisible by 7Yes

Divisible by 8No, remainder 1

Divisible by 9Yes

Divisible by 10No, remainder 1

Divisible by 11No, remainder 1

Divisible by 12No, remainder 9

Divisible by 100No, remainder 41

Collatz (3n + 1) trajectory

Steps to reach 127the total stopping time

Highest value reached1,4923× the starting value

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

First steps441 → 1,324 → 662 → 331 → 994 → 497 → 1,492 → 746 → 373 → 1,120 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage44,100%

441% as a decimal4.41

441% of 100441

441% of 1,0004,410

As a fraction of 100441/100

Read another way

As seconds7 minutes and 21 seconds

As bytes441 B

As a 24-bit colour#0001B9

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Neighbouring numbers

Derived from 441

Nearby primes

#000441 (colour)

#000441
Blue
Dark
Nearest: Midnight blue

#000441 is a blue with RGB values 0, 4, 65 and HSL 236°, 100%, 13%. It is a dark colour, so white text on it reaches 19.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Open this reading on its own page →

Colour values

#000441#000441

HEX#000441

RGBrgb(0, 4, 65)

RGB (0–1)0, 0.0157, 0.2549

RGB percentages0%, 1.6%, 25.5%

HSLhsl(236.3, 100%, 12.7%)

HSV / HSBhsv(236.3, 100%, 25.5%)

CMYK100%, 93.8%, 0%, 74.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,089

CSS custom property--colour: #000441;

Brightness & contrast

Relative luminance0.00468WCAG 2.x, 0 is black and 1 is white

Perceived brightness22.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 19.2:1

Contrast with white19.2:1WCAG normal text: AAA

Contrast with black1.09:1WCAG normal text: Fail

Greyscale equivalent#080808

Inverted#FFFBBE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#001243no red cones; affects about 1% of men; ΔE 8.3 from the original

Deuteranopia#000B40no green cones; the most common form, about 1% of men; ΔE 4.9 from the original

Tritanopia#001823no blue cones; rare, and affects men and women equally; ΔE 37.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text19.2:1WCAG large text: AAA

Contrast with black, large text1.09:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 19.6 Dark slateblue · ΔE 27.4 Rebecca purple · ΔE 36.8 Indigo · ΔE 37.4 Navy · ΔE 38.5 Black · ΔE 43.3

Nearest named CSS colourMidnight blue (#191970)ΔE 19.61, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#413D00

Analogous#002441, #1D0041

Triadic#410004, #044100

Split complementary#411D00, #244100

Tetradic#410024, #413D00, #00411D

Tints, shades & saturation

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

Lighter +40%#0E1DFF

Lighter +30%#000DDA

Lighter +20%#000AA7

Lighter +10%#000774

Darker −10%#00010E

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#000441

Less saturated −25%#080B39

Channel breakdown

B65

Red0 (0%)

Green4 (1.6%)

Blue65 (25.5%)

Hue236.31°

Saturation (HSL)100%

Lightness12.75%

Dominant channelBlue

Hex per channelR 00 · G 04 · B 41

Keep nerding

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441

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 441

Nearby primes

Other readings

#000441 (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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