Number
998,990
- Positive
- Even
- Composite
- 6 digits
998,990 is an even 6-digit integer and a composite number. It has 16 divisors and a digital root of 8.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value998,990
Digit count6
Digit sum44
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 283 × 353
Distinct prime factors42, 5, 283, 353
Number of divisors16
Sum of divisors σ(n)1,809,648
Aliquot sum810,658sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)397,056integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 283, 353, 566, 706, 1,415, 1,765, 2,830, 3,530, 99,899, 199,798, 499,495, 998,99016 in total
Arithmetic
Representations
Decimal998,990
Binary1111001111100100111020 bits
Octal3637116
HexadecimalF3E4E
Base 36LETQ
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsnine hundred and ninety-eight thousand, nine hundred and ninety
Ordinalnine hundred and ninety-eight thousand, nine hundred and ninetieth
Scientific notation9.9899 × 10^5
Engineering notation998.99 × 10^3
Nearest landmarks
Powers & multiples
998,990 to the power 2997,981,020,100
998,990 to the power 3996,973,059,269,699,000
998,990 to the power 4995,966,116,479,836,604,010,000
998,990 to the power 5994,960,190,702,191,969,039,949,900,000
First ten multiples998,990, 1,997,980, 2,996,970, 3,995,960, 4,994,950, 5,993,940, 6,992,930, 7,991,920, 8,990,910, 9,989,900
Powers of twoBetween 2^19 (524,288) and 2^20 (1,048,576)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 2
Divisible by 7No, remainder 6
Divisible by 8No, remainder 6
Divisible by 9No, remainder 8
Divisible by 10Yes
Divisible by 11No, remainder 3
Divisible by 12No, remainder 2
Divisible by 100No, remainder 90
Collatz (3n + 1) trajectory
Steps to reach 1113the total stopping time
Highest value reached3,793,0483× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps998,990 → 499,495 → 1,498,486 → 749,243 → 2,247,730 → 1,123,865 → 3,371,596 → 1,685,798 → 842,899 → 2,528,698 → …
Last steps… → 32 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage99,899,000%
998,990% as a decimal9,989.9
998,990% of 100998,990
998,990% of 1,0009,989,900
As a fraction of 100998,990/100
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Derived from 998,990
Also reads as
#998990 (colour)
- #998990
- Grey
- Dark
- Nearest: Gray
#998990 is a grey with RGB values 153, 137, 144 and HSL 334°, 7%, 57%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Gray.
Colour values
#998990#998990
HEX#998990
RGBrgb(153, 137, 144)
RGB (0–1)0.6, 0.5373, 0.5647
RGB percentages60%, 53.7%, 56.5%
HSLhsl(333.8, 7.3%, 56.9%)
HSV / HSBhsv(333.8, 10.5%, 60%)
CMYK0%, 10.5%, 5.9%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,062,224
CSS custom property--colour: #998990;
Brightness & contrast
Relative luminance0.26677WCAG 2.x, 0 is black and 1 is white
Perceived brightness142.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.34:1
Contrast with white3.31:1WCAG normal text: Fail
Contrast with black6.34:1WCAG normal text: AA
Greyscale equivalent#8D8D8D
Inverted#66766F
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.31:1WCAG large text: AA
Contrast with black, large text6.34:1WCAG large text: AAA
Named colours
Hue familygrey
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#899992
Analogous#998998, #998A89
Triadic#909989, #899099
Split complementary#89998A, #899899
Tetradic#989989, #899992, #8A8999
Tints, shades & saturation
Channel breakdown
R153
G137
B144
Red153 (60%)
Green137 (53.7%)
Blue144 (56.5%)
Hue333.75°
Saturation (HSL)7.27%
Lightness56.86%
Dominant channelRed
Hex per channelR 99 · G 89 · B 90
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Harmonies
Similar named colours
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