Number
449
- Positive
- Odd
- Prime
- 3 digits
449 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 8.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value449
Digit count3
Digit sum17
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation449
Distinct prime factors1449
Number of divisors2
Sum of divisors σ(n)450
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)448integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 4492 in total
Arithmetic
Representations
Decimal449
Binary1110000019 bits
Octal701
Hexadecimal1C1
Base 36CH
Roman numeralCDXLIX
In wordsfour hundred and forty-nine
Ordinalfour hundred and forty-ninth
Scientific notation4.49 × 10^2
Engineering notation449
Nearest landmarks
Powers & multiples
449 to the power 2201,601
449 to the power 390,518,849
449 to the power 440,642,963,201
449 to the power 518,248,690,477,249
First ten multiples449, 898, 1,347, 1,796, 2,245, 2,694, 3,143, 3,592, 4,041, 4,490
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 1
Divisible by 5No, remainder 4
Divisible by 6No, remainder 5
Divisible by 7No, remainder 1
Divisible by 8No, remainder 1
Divisible by 9No, remainder 8
Divisible by 10No, remainder 9
Divisible by 11No, remainder 9
Divisible by 12No, remainder 5
Divisible by 100No, remainder 49
Collatz (3n + 1) trajectory
Steps to reach 1115the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps449 → 1,348 → 674 → 337 → 1,012 → 506 → 253 → 760 → 380 → 190 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage44,900%
449% as a decimal4.49
449% of 100449
449% of 1,0004,490
As a fraction of 100449/100
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Derived from 449
Other readings
Also reads as
#444499 (colour)
- #444499
- Blue
- Dark
- Nearest: Dark slateblue
#444499 is a blue with RGB values 68, 68, 153 and HSL 240°, 38%, 43%. 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 slateblue.
Colour values
#444499#444499
HEX#444499
HEX (short)#449
RGBrgb(68, 68, 153)
RGB (0–1)0.2667, 0.2667, 0.6
RGB percentages26.7%, 26.7%, 60%
HSLhsl(240, 38.5%, 43.3%)
HSV / HSBhsv(240, 55.6%, 60%)
CMYK55.6%, 55.6%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,474,009
CSS custom property--colour: #444499;
Brightness & contrast
Relative luminance0.07663WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.29:1
Contrast with white8.29:1WCAG normal text: AAA
Contrast with black2.53:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#BBBB66
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.29:1WCAG large text: AAA
Contrast with black, large text2.53:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#999944
Analogous#446F99, #6F4499
Triadic#994444, #449944
Split complementary#996F44, #6F9944
Tetradic#99446F, #999944, #44996F
Tints, shades & saturation
Channel breakdown
R68
G68
B153
Red68 (26.7%)
Green68 (26.7%)
Blue153 (60%)
Hue240°
Saturation (HSL)38.46%
Lightness43.33%
Dominant channelBlue
Hex per channelR 44 · G 44 · B 99
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Harmonies
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