Recognised as Number
284
- Positive
- Even
- Composite
- 3 digits
284 is an even 3-digit integer and a composite number. It has 6 divisors and a digital root of 5.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value284
Digit count3
Digit sum14
Digit product64
Multiplicative persistence3times the digit product can be taken before one digit is left
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 71
Distinct prime factors22, 71
Number of divisors6
Sum of divisors σ(n)504
Aliquot sum220sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)140integers below n that share no factor with it
Carmichael function λ(n)70the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 140
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 71, 142, 2846 in total
Arithmetic
Representations
Decimal284
Binary1000111009 bits
Octal434
Hexadecimal11C
Base 367W
Roman numeralCCLXXXIV
In wordstwo hundred and eighty-four
Ordinaltwo hundred and eighty-fourth
Scientific notation2.84 × 10^2
Engineering notation284
In other bases
Ternary101112base 3; the most digit-efficient integer base after e: 6 digits
Quinary2114base 5; one hand: 4 digits
Septenary554base 7: 3 digits
Nonary345base 9; each digit is two ternary digits: 3 digits
Duodecimal1b8base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimale4base 20; hands and feet, and the Mayan and Yoruba systems: 2 digits
Sexagesimal4:44base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary11TTTTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary101101100base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000000100011100
Bit length9 bitsto write the magnitude
Set bits4the population count, or Hamming weight
Zero bits5within that length
Bit parityeven4 set bits, so even; not the same as the number itself being even
Highest set bitbit 8worth 256
Lowest set bitbit 22 trailing zeros
Power of twoNo
Bytes201 1c
Gray code110010010n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000000100011100
32-bit00000000000000000000000100011100
64-bit0000000000000000000000000000000000000000000000000000000100011100
One's complement1111111011100011at 16 bits, every bit flipped
Bits reversed0011100010000000at 16 bits
Rotated left by 10000001000111000at 16 bits, wrapping
Shifted left by 11000111000= 568, no wrap
Shifted right by 110001110= 142, discarding the low bit
These bits as a double1.40314643 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
284 to the power 280,656
284 to the power 322,906,304
284 to the power 46,505,390,336
284 to the power 51,847,530,855,424
First ten multiples284, 568, 852, 1,136, 1,420, 1,704, 1,988, 2,272, 2,556, 2,840
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4Yes
Divisible by 5No, remainder 4
Divisible by 6No, remainder 2
Divisible by 7No, remainder 4
Divisible by 8No, remainder 4
Divisible by 9No, remainder 5
Divisible by 10No, remainder 4
Divisible by 11No, remainder 9
Divisible by 12No, remainder 8
Divisible by 100No, remainder 84
Collatz (3n + 1) trajectory
Steps to reach 1104the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps284 → 142 → 71 → 214 → 107 → 322 → 161 → 484 → 242 → 121 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage28,400%
284% as a decimal2.84
284% of 100284
284% of 1,0002,840
As a fraction of 100284/100
Read another way
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Derived from 284
Other readings
Also reads as
#228844 (colour)
- #228844
- Green
- Dark
- Nearest: Sea green
#228844 is a green with RGB values 34, 136, 68 and HSL 140°, 60%, 33%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Sea green.
Colour values
#228844#228844
HEX#228844
HEX (short)#284
RGBrgb(34, 136, 68)
RGB (0–1)0.1333, 0.5333, 0.2667
RGB percentages13.3%, 53.3%, 26.7%
HSLhsl(140, 60%, 33.3%)
HSV / HSBhsv(140, 75%, 53.3%)
CMYK75%, 0%, 50%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,263,108
CSS custom property--colour: #228844;
Brightness & contrast
Relative luminance0.18366WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.67:1
Contrast with white4.49:1WCAG normal text: Fail
Contrast with black4.67:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#DD77BB
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.49:1WCAG large text: AA
Contrast with black, large text4.67:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#882266
Analogous#338822, #228877
Triadic#442288, #884422
Split complementary#772288, #882233
Tetradic#223388, #882266, #887722
Tints, shades & saturation
Channel breakdown
R34
G136
B68
Red34 (13.3%)
Green136 (53.3%)
Blue68 (26.7%)
Hue140°
Saturation (HSL)60%
Lightness33.33%
Dominant channelGreen
Hex per channelR 22 · G 88 · B 44
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Harmonies
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