Number
830
- Positive
- Even
- Composite
- 3 digits
830 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 2.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value830
Digit count3
Digit sum11
Digital root2repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 83
Distinct prime factors32, 5, 83
Number of divisors8
Sum of divisors σ(n)1,512
Aliquot sum682sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)328integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 83, 166, 415, 8308 in total
Arithmetic
Representations
Decimal830
Binary110011111010 bits
Octal1476
Hexadecimal33E
Base 36N2
Roman numeralDCCCXXX
In wordseight hundred and thirty
Ordinaleight hundred and thirtieth
Scientific notation8.3 × 10^2
Engineering notation830
Nearest landmarks
Powers & multiples
830 to the power 2688,900
830 to the power 3571,787,000
830 to the power 4474,583,210,000
830 to the power 5393,904,064,300,000
First ten multiples830, 1,660, 2,490, 3,320, 4,150, 4,980, 5,810, 6,640, 7,470, 8,300
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 2
Divisible by 7No, remainder 4
Divisible by 8No, remainder 6
Divisible by 9No, remainder 2
Divisible by 10Yes
Divisible by 11No, remainder 5
Divisible by 12No, remainder 2
Divisible by 100No, remainder 30
Collatz (3n + 1) trajectory
Steps to reach 1134the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps830 → 415 → 1,246 → 623 → 1,870 → 935 → 2,806 → 1,403 → 4,210 → 2,105 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage83,000%
830% as a decimal8.3
830% of 100830
830% of 1,0008,300
As a fraction of 100830/100
Read another way
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Derived from 830
Other readings
Also reads as
#883300 (colour)
- #883300
- Orange
- Dark
- Nearest: Saddle brown
#883300 is a orange with RGB values 136, 51, 0 and HSL 23°, 100%, 27%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.
Colour values
#883300#883300
HEX#883300
HEX (short)#830
RGBrgb(136, 51, 0)
RGB (0–1)0.5333, 0.2, 0
RGB percentages53.3%, 20%, 0%
HSLhsl(22.5, 100%, 26.7%)
HSV / HSBhsv(22.5, 100%, 53.3%)
CMYK0%, 62.5%, 100%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,925,952
CSS custom property--colour: #883300;
Brightness & contrast
Relative luminance0.07602WCAG 2.x, 0 is black and 1 is white
Perceived brightness84 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.33:1
Contrast with white8.33:1WCAG normal text: AAA
Contrast with black2.52:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#77CCFF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.33:1WCAG large text: AAA
Contrast with black, large text2.52:1WCAG large text: Fail
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#005588
Analogous#880011, #887700
Triadic#008833, #330088
Split complementary#008877, #001188
Tetradic#118800, #005588, #770088
Tints, shades & saturation
Channel breakdown
R136
G51
B0
Red136 (53.3%)
Green51 (20%)
Blue0 (0%)
Hue22.5°
Saturation (HSL)100%
Lightness26.67%
Dominant channelRed
Hex per channelR 88 · G 33 · B 00
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