Number
358
- Positive
- Even
- Composite
- 3 digits
358 is an even 3-digit integer and a composite number. It has 4 divisors and a digital root of 7.
The canonical address for this page is /358.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value358
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 × 179
Distinct prime factors22, 179
Number of divisors4
Sum of divisors σ(n)540
Aliquot sum182sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)178integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 179, 3584 in total
Arithmetic
Representations
Decimal358
Binary1011001109 bits
Octal546
Hexadecimal166
Base 369Y
Roman numeralCCCLVIII
In wordsthree hundred and fifty-eight
Ordinalthree hundred and fifty-eighth
Scientific notation3.58 × 10^2
Engineering notation358
Nearest landmarks
Powers & multiples
358 to the power 2128,164
358 to the power 345,882,712
358 to the power 416,426,010,896
358 to the power 55,880,511,900,768
First ten multiples358, 716, 1,074, 1,432, 1,790, 2,148, 2,506, 2,864, 3,222, 3,580
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5No, remainder 3
Divisible by 6No, remainder 4
Divisible by 7No, remainder 1
Divisible by 8No, remainder 6
Divisible by 9No, remainder 7
Divisible by 10No, remainder 8
Divisible by 11No, remainder 6
Divisible by 12No, remainder 10
Divisible by 100No, remainder 58
Collatz (3n + 1) trajectory
Steps to reach 132the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps358 → 179 → 538 → 269 → 808 → 404 → 202 → 101 → 304 → 152 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage35,800%
358% as a decimal3.58
358% of 100358
358% of 1,0003,580
As a fraction of 100358/100
Read another way
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Derived from 358
Other readings
Also reads as
#000358 (colour)
- #000358
- Blue
- Dark
- Nearest: Midnight blue
#000358 is a blue with RGB values 0, 3, 88 and HSL 238°, 100%, 17%. It is a dark colour, so white text on it reaches 18.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.
Colour values
#000358#000358
HEX#000358
RGBrgb(0, 3, 88)
RGB (0–1)0, 0.0118, 0.3451
RGB percentages0%, 1.2%, 34.5%
HSLhsl(238, 100%, 17.3%)
HSV / HSBhsv(238, 100%, 34.5%)
CMYK100%, 96.6%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer856
CSS custom property--colour: #000358;
Brightness & contrast
Relative luminance0.0077WCAG 2.x, 0 is black and 1 is white
Perceived brightness29.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.2:1
Contrast with white18.2:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#080808
Inverted#FFFCA7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text18.2:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#585500
Analogous#002F58, #290058
Triadic#580003, #035800
Split complementary#582900, #2F5800
Tetradic#58002F, #585500, #005829
Tints, shades & saturation
Channel breakdown
R0
G3
B88
Red0 (0%)
Green3 (1.2%)
Blue88 (34.5%)
Hue237.95°
Saturation (HSL)100%
Lightness17.25%
Dominant channelBlue
Hex per channelR 00 · G 03 · B 58
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Harmonies
Similar named colours
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