Number
450
- Positive
- Even
- Composite
- 3 digits
450 is an even 3-digit integer and a composite number. It has 18 divisors and a digital root of 9.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value450
Digit count3
Digit sum9
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 3^2 × 5^2
Distinct prime factors32, 3, 5
Number of divisors18
Sum of divisors σ(n)1,209
Aliquot sum759sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)120integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, 225, 45018 in total
Arithmetic
Representations
Decimal450
Binary1110000109 bits
Octal702
Hexadecimal1C2
Base 36CI
Roman numeralCDL
In wordsfour hundred and fifty
Ordinalfour hundred and fiftieth
Scientific notation4.5 × 10^2
Engineering notation450
Nearest landmarks
Powers & multiples
450 to the power 2202,500
450 to the power 391,125,000
450 to the power 441,006,250,000
450 to the power 518,452,812,500,000
First ten multiples450, 900, 1,350, 1,800, 2,250, 2,700, 3,150, 3,600, 4,050, 4,500
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6Yes
Divisible by 7No, remainder 2
Divisible by 8No, remainder 2
Divisible by 9Yes
Divisible by 10Yes
Divisible by 11No, remainder 10
Divisible by 12No, remainder 6
Divisible by 100No, remainder 50
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 steps450 → 225 → 676 → 338 → 169 → 508 → 254 → 127 → 382 → 191 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage45,000%
450% as a decimal4.5
450% of 100450
450% of 1,0004,500
As a fraction of 100450/100
Read another way
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Derived from 450
Other readings
Also reads as
#445500 (colour)
- #445500
- Green
- Dark
- Nearest: Dark olivegreen
#445500 is a green with RGB values 68, 85, 0 and HSL 72°, 100%, 17%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#445500#445500
HEX#445500
HEX (short)#450
RGBrgb(68, 85, 0)
RGB (0–1)0.2667, 0.3333, 0
RGB percentages26.7%, 33.3%, 0%
HSLhsl(72, 100%, 16.7%)
HSV / HSBhsv(72, 100%, 33.3%)
CMYK20%, 0%, 100%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,478,208
CSS custom property--colour: #445500;
Brightness & contrast
Relative luminance0.07726WCAG 2.x, 0 is black and 1 is white
Perceived brightness75 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.25:1
Contrast with white8.25:1WCAG normal text: AAA
Contrast with black2.55:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#BBAAFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.25:1WCAG large text: AAA
Contrast with black, large text2.55:1WCAG large text: Fail
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#110055
Analogous#553B00, #195500
Triadic#004455, #550044
Split complementary#001955, #3C0055
Tetradic#00553C, #110055, #550019
Tints, shades & saturation
Channel breakdown
R68
G85
B0
Red68 (26.7%)
Green85 (33.3%)
Blue0 (0%)
Hue72°
Saturation (HSL)100%
Lightness16.67%
Dominant channelGreen
Hex per channelR 44 · G 55 · B 00
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Harmonies
Similar named colours
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