Number
230
- Positive
- Even
- Composite
- 3 digits
230 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 5.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value230
Digit count3
Digit sum5
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 23
Distinct prime factors32, 5, 23
Number of divisors8
Sum of divisors σ(n)432
Aliquot sum202sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)88integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 23, 46, 115, 2308 in total
Arithmetic
Representations
Decimal230
Binary111001108 bits
Octal346
HexadecimalE6
Base 366E
Roman numeralCCXXX
In wordstwo hundred and thirty
Ordinaltwo hundred and thirtieth
Scientific notation2.3 × 10^2
Engineering notation230
Nearest landmarks
Powers & multiples
230 to the power 252,900
230 to the power 312,167,000
230 to the power 42,798,410,000
230 to the power 5643,634,300,000
First ten multiples230, 460, 690, 920, 1,150, 1,380, 1,610, 1,840, 2,070, 2,300
Powers of twoBetween 2^7 (128) and 2^8 (256)
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 6
Divisible by 8No, remainder 6
Divisible by 9No, remainder 5
Divisible by 10Yes
Divisible by 11No, remainder 10
Divisible by 12No, remainder 2
Divisible by 100No, remainder 30
Collatz (3n + 1) trajectory
Steps to reach 134the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps230 → 115 → 346 → 173 → 520 → 260 → 130 → 65 → 196 → 98 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage23,000%
230% as a decimal2.3
230% of 100230
230% of 1,0002,300
As a fraction of 100230/100
Read another way
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Derived from 230
Other readings
Also reads as
#223300 (colour)
- #223300
- Green
- Dark
- Nearest: Dark olivegreen
#223300 is a green with RGB values 34, 51, 0 and HSL 80°, 100%, 10%. It is a dark colour, so white text on it reaches 13.6:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#223300#223300
HEX#223300
HEX (short)#230
RGBrgb(34, 51, 0)
RGB (0–1)0.1333, 0.2, 0
RGB percentages13.3%, 20%, 0%
HSLhsl(80, 100%, 10%)
HSV / HSBhsv(80, 100%, 20%)
CMYK33.3%, 0%, 100%, 80%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,241,280
CSS custom property--colour: #223300;
Brightness & contrast
Relative luminance0.02708WCAG 2.x, 0 is black and 1 is white
Perceived brightness43.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.62:1
Contrast with white13.62:1WCAG normal text: AAA
Contrast with black1.54:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#DDCCFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.62:1WCAG large text: AAA
Contrast with black, large text1.54:1WCAG large text: Fail
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#110033
Analogous#332B00, #093300
Triadic#002233, #330022
Split complementary#000833, #2A0033
Tetradic#00332B, #110033, #330009
Tints, shades & saturation
Channel breakdown
R34
G51
B0
Red34 (13.3%)
Green51 (20%)
Blue0 (0%)
Hue80°
Saturation (HSL)100%
Lightness10%
Dominant channelGreen
Hex per channelR 22 · G 33 · B 00
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Harmonies
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