Number
844
- Positive
- Even
- Composite
- 3 digits
844 is an even 3-digit integer and a composite number. It has 6 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value844
Digit count3
Digit sum16
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 211
Distinct prime factors22, 211
Number of divisors6
Sum of divisors σ(n)1,484
Aliquot sum640sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)420integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 211, 422, 8446 in total
Arithmetic
Representations
Decimal844
Binary110100110010 bits
Octal1514
Hexadecimal34C
Base 36NG
Roman numeralDCCCXLIV
In wordseight hundred and forty-four
Ordinaleight hundred and forty-fourth
Scientific notation8.44 × 10^2
Engineering notation844
Nearest landmarks
Powers & multiples
844 to the power 2712,336
844 to the power 3601,211,584
844 to the power 4507,422,576,896
844 to the power 5428,264,654,900,224
First ten multiples844, 1,688, 2,532, 3,376, 4,220, 5,064, 5,908, 6,752, 7,596, 8,440
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5No, remainder 4
Divisible by 6No, remainder 4
Divisible by 7No, remainder 4
Divisible by 8No, remainder 4
Divisible by 9No, remainder 7
Divisible by 10No, remainder 4
Divisible by 11No, remainder 8
Divisible by 12No, remainder 4
Divisible by 100No, remainder 44
Collatz (3n + 1) trajectory
Steps to reach 141the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps844 → 422 → 211 → 634 → 317 → 952 → 476 → 238 → 119 → 358 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage84,400%
844% as a decimal8.44
844% of 100844
844% of 1,0008,440
As a fraction of 100844/100
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Derived from 844
Other readings
Also reads as
#884444 (colour)
- #884444
- Red
- Dark
- Nearest: Sienna
#884444 is a red with RGB values 136, 68, 68 and HSL 0°, 33%, 40%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Sienna.
Colour values
#884444#884444
HEX#884444
HEX (short)#844
RGBrgb(136, 68, 68)
RGB (0–1)0.5333, 0.2667, 0.2667
RGB percentages53.3%, 26.7%, 26.7%
HSLhsl(0, 33.3%, 40%)
HSV / HSBhsv(0, 50%, 53.3%)
CMYK0%, 50%, 50%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,930,372
CSS custom property--colour: #884444;
Brightness & contrast
Relative luminance0.09786WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.1:1
Contrast with white7.1:1WCAG normal text: AAA
Contrast with black2.96:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#77BBBB
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.1:1WCAG large text: AAA
Contrast with black, large text2.96:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#448888
Analogous#884466, #886644
Triadic#448844, #444488
Split complementary#448866, #446688
Tetradic#668844, #448888, #664488
Tints, shades & saturation
Channel breakdown
R136
G68
B68
Red136 (53.3%)
Green68 (26.7%)
Blue68 (26.7%)
Hue0°
Saturation (HSL)33.33%
Lightness40%
Dominant channelRed
Hex per channelR 88 · G 44 · B 44
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Harmonies
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