Number
427
- Positive
- Odd
- Composite
- 3 digits
427 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 4.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value427
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 factorisation7 × 61
Distinct prime factors27, 61
Number of divisors4
Sum of divisors σ(n)496
Aliquot sum69sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)360integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 7, 61, 4274 in total
Arithmetic
Representations
Decimal427
Binary1101010119 bits
Octal653
Hexadecimal1AB
Base 36BV
Roman numeralCDXXVII
In wordsfour hundred and twenty-seven
Ordinalfour hundred and twenty-seventh
Scientific notation4.27 × 10^2
Engineering notation427
Nearest landmarks
Powers & multiples
427 to the power 2182,329
427 to the power 377,854,483
427 to the power 433,243,864,241
427 to the power 514,195,130,030,907
First ten multiples427, 854, 1,281, 1,708, 2,135, 2,562, 2,989, 3,416, 3,843, 4,270
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 2
Divisible by 6No, remainder 1
Divisible by 7Yes
Divisible by 8No, remainder 3
Divisible by 9No, remainder 4
Divisible by 10No, remainder 7
Divisible by 11No, remainder 9
Divisible by 12No, remainder 7
Divisible by 100No, remainder 27
Collatz (3n + 1) trajectory
Steps to reach 153the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps427 → 1,282 → 641 → 1,924 → 962 → 481 → 1,444 → 722 → 361 → 1,084 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage42,700%
427% as a decimal4.27
427% of 100427
427% of 1,0004,270
As a fraction of 100427/100
Read another way
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Derived from 427
Other readings
Also reads as
#442277 (colour)
- #442277
- Violet
- Dark
- Nearest: Midnight blue
#442277 is a violet with RGB values 68, 34, 119 and HSL 264°, 56%, 30%. It is a dark colour, so white text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.
Colour values
#442277#442277
HEX#442277
HEX (short)#427
RGBrgb(68, 34, 119)
RGB (0–1)0.2667, 0.1333, 0.4667
RGB percentages26.7%, 13.3%, 46.7%
HSLhsl(264, 55.6%, 30%)
HSV / HSBhsv(264, 71.4%, 46.7%)
CMYK42.9%, 71.4%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,465,271
CSS custom property--colour: #442277;
Brightness & contrast
Relative luminance0.03705WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.06:1
Contrast with white12.06:1WCAG normal text: AAA
Contrast with black1.74:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#BBDD88
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.06:1WCAG large text: AAA
Contrast with black, large text1.74:1WCAG large text: Fail
Named colours
Hue familyviolet
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#557722
Analogous#222B77, #6F2277
Triadic#774422, #227744
Split complementary#776F22, #2B7722
Tetradic#77222A, #557722, #22776F
Tints, shades & saturation
Channel breakdown
R68
G34
B119
Red68 (26.7%)
Green34 (13.3%)
Blue119 (46.7%)
Hue264°
Saturation (HSL)55.56%
Lightness30%
Dominant channelBlue
Hex per channelR 44 · G 22 · B 77
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Harmonies
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