Number
248
- Positive
- Even
- Composite
- 3 digits
248 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 value248
Digit count3
Digit sum14
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^3 × 31
Distinct prime factors22, 31
Number of divisors8
Sum of divisors σ(n)480
Aliquot sum232sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)120integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 8, 31, 62, 124, 2488 in total
Arithmetic
Representations
Decimal248
Binary111110008 bits
Octal370
HexadecimalF8
Base 366W
Roman numeralCCXLVIII
In wordstwo hundred and forty-eight
Ordinaltwo hundred and forty-eighth
Scientific notation2.48 × 10^2
Engineering notation248
Nearest landmarks
Powers & multiples
248 to the power 261,504
248 to the power 315,252,992
248 to the power 43,782,742,016
248 to the power 5938,120,019,968
First ten multiples248, 496, 744, 992, 1,240, 1,488, 1,736, 1,984, 2,232, 2,480
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4Yes
Divisible by 5No, remainder 3
Divisible by 6No, remainder 2
Divisible by 7No, remainder 3
Divisible by 8Yes
Divisible by 9No, remainder 5
Divisible by 10No, remainder 8
Divisible by 11No, remainder 6
Divisible by 12No, remainder 8
Divisible by 100No, remainder 48
Collatz (3n + 1) trajectory
Steps to reach 1109the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps248 → 124 → 62 → 31 → 94 → 47 → 142 → 71 → 214 → 107 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage24,800%
248% as a decimal2.48
248% of 100248
248% of 1,0002,480
As a fraction of 100248/100
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Derived from 248
Other readings
Also reads as
#224488 (colour)
- #224488
- Blue
- Dark
- Nearest: Dark slateblue
#224488 is a blue with RGB values 34, 68, 136 and HSL 220°, 60%, 33%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.
Colour values
#224488#224488
HEX#224488
HEX (short)#248
RGBrgb(34, 68, 136)
RGB (0–1)0.1333, 0.2667, 0.5333
RGB percentages13.3%, 26.7%, 53.3%
HSLhsl(220, 60%, 33.3%)
HSV / HSBhsv(220, 75%, 53.3%)
CMYK75%, 50%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,245,768
CSS custom property--colour: #224488;
Brightness & contrast
Relative luminance0.06252WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.33:1
Contrast with white9.33:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#DDBB77
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.33:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#886622
Analogous#227788, #332288
Triadic#882244, #448822
Split complementary#883322, #778822
Tetradic#882277, #886622, #228833
Tints, shades & saturation
Channel breakdown
R34
G68
B136
Red34 (13.3%)
Green68 (26.7%)
Blue136 (53.3%)
Hue220°
Saturation (HSL)60%
Lightness33.33%
Dominant channelBlue
Hex per channelR 22 · G 44 · B 88
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Harmonies
Similar named colours
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