Number
850
- Positive
- Even
- Composite
- 3 digits
850 is an even 3-digit integer and a composite number. It has 12 divisors and a digital root of 4.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value850
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 × 5^2 × 17
Distinct prime factors32, 5, 17
Number of divisors12
Sum of divisors σ(n)1,674
Aliquot sum824sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)320integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 5, 10, 17, 25, 34, 50, 85, 170, 425, 85012 in total
Arithmetic
Representations
Decimal850
Binary110101001010 bits
Octal1522
Hexadecimal352
Base 36NM
Roman numeralDCCCL
In wordseight hundred and fifty
Ordinaleight hundred and fiftieth
Scientific notation8.5 × 10^2
Engineering notation850
Nearest landmarks
Powers & multiples
850 to the power 2722,500
850 to the power 3614,125,000
850 to the power 4522,006,250,000
850 to the power 5443,705,312,500,000
First ten multiples850, 1,700, 2,550, 3,400, 4,250, 5,100, 5,950, 6,800, 7,650, 8,500
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 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 3
Divisible by 8No, remainder 2
Divisible by 9No, remainder 4
Divisible by 10Yes
Divisible by 11No, remainder 3
Divisible by 12No, remainder 10
Divisible by 100No, remainder 50
Collatz (3n + 1) trajectory
Steps to reach 159the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps850 → 425 → 1,276 → 638 → 319 → 958 → 479 → 1,438 → 719 → 2,158 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage85,000%
850% as a decimal8.5
850% of 100850
850% of 1,0008,500
As a fraction of 100850/100
Read another way
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Derived from 850
Other readings
Also reads as
#885500 (colour)
- #885500
- Orange
- Dark
- Nearest: Saddle brown
#885500 is a orange with RGB values 136, 85, 0 and HSL 38°, 100%, 27%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Saddle brown.
Colour values
#885500#885500
HEX#885500
HEX (short)#850
RGBrgb(136, 85, 0)
RGB (0–1)0.5333, 0.3333, 0
RGB percentages53.3%, 33.3%, 0%
HSLhsl(37.5, 100%, 26.7%)
HSV / HSBhsv(37.5, 100%, 53.3%)
CMYK0%, 37.5%, 100%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,934,656
CSS custom property--colour: #885500;
Brightness & contrast
Relative luminance0.11731WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.28:1
Contrast with white6.28:1WCAG normal text: AA
Contrast with black3.35:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#77AAFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.28:1WCAG large text: AAA
Contrast with black, large text3.35:1WCAG large text: AA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#003388
Analogous#881100, #778800
Triadic#008855, #550088
Split complementary#007788, #110088
Tetradic#008811, #003388, #880077
Tints, shades & saturation
Channel breakdown
R136
G85
B0
Red136 (53.3%)
Green85 (33.3%)
Blue0 (0%)
Hue37.5°
Saturation (HSL)100%
Lightness26.67%
Dominant channelRed
Hex per channelR 88 · G 55 · B 00
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Harmonies
Similar named colours
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