Number

3,998

Positive
Even
Composite
4 digits

3,998 is an even 4-digit integer and a composite number. It has 4 divisors and a digital root of 2.

Number properties

ParityEvendivisible by 2

SignPositive

PrimalityComposite

Absolute value3,998

Digit count4

Digit sum29

Digital root2repeated digit sum

PalindromicNoreads differently backwards

Happy numberNosquared-digit sums reach 1

Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2 × 1,999

Distinct prime factors22, 1,999

Number of divisors4

Sum of divisors σ(n)6,000

Aliquot sum2,002sum of the proper divisors

ClassificationDeficientthe aliquot sum is less than the number

Euler's totient φ(n)1,998integers below n that share no factor with it

SquarefreeYesno repeated prime factor

All divisors1, 2, 1,999, 3,9984 in total

Arithmetic

Previous number3,997

Next number3,999

Double7,996

Half1,999

Square15,984,004

Cube63,904,047,992

Square root63.229739838≈irrational, shown to 9 decimal places

Cube root15.87136441≈

Negation-3,998

Reciprocal0.0002501251≈

Representations

Decimal3,998

Binary11111001111012 bits

Octal7636

HexadecimalF9E

Base 36332

Roman numeralMMMCMXCVIII

In wordsthree thousand, nine hundred and ninety-eight

Ordinalthree thousand, nine hundred and ninety-eighth

Scientific notation3.998 × 10^3

Engineering notation3.998 × 10^3

Nearest landmarks

Next prime4,001+3

Previous prime3,989−9

Distance to nearest prime3

Nearest square below3,969

Nearest square above4,096

Powers & multiples

3,998 to the power 215,984,004

3,998 to the power 363,904,047,992

3,998 to the power 4255,488,383,872,016

3,998 to the power 51,021,442,558,720,319,968

First ten multiples3,998, 7,996, 11,994, 15,992, 19,990, 23,988, 27,986, 31,984, 35,982, 39,980

Powers of twoBetween 2^11 (2,048) and 2^12 (4,096)

Divisibility tests

Divisible by 2Yes

Divisible by 3No, remainder 2

Divisible by 4No, remainder 2

Divisible by 5No, remainder 3

Divisible by 6No, remainder 2

Divisible by 7No, remainder 1

Divisible by 8No, remainder 6

Divisible by 9No, remainder 2

Divisible by 10No, remainder 8

Divisible by 11No, remainder 5

Divisible by 12No, remainder 2

Divisible by 100No, remainder 98

Collatz (3n + 1) trajectory

Steps to reach 151the total stopping time

Highest value reached20,2485× the starting value

Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven

First steps3,998 → 1,999 → 5,998 → 2,999 → 8,998 → 4,499 → 13,498 → 6,749 → 20,248 → 10,124 → …

Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage399,800%

3,998% as a decimal39.98

3,998% of 1003,998

3,998% of 1,00039,980

As a fraction of 1003,998/100

Read another way

As seconds1 hour, 6 minutes and 38 seconds

As bytes3.904 KiB

As a 24-bit colour#000F9E

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Neighbouring numbers

Derived from 3,998

Nearby primes

3998 (year)

Common year
365 days
40th century
Dog

3998 will be a common year of 365 days. It begins on a Thursday and ends on a Thursday. Easter Sunday falls on 29 March.

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Structure of the year

Leap yearNonot divisible by 4

Days in the year365

Weeks in the year53ISO 8601 weeks; 28 December is always in the final week

Days in February28

1 January fell on aThursday

31 December fell on aThursday

Century40th century

Decade3990s

Chinese zodiacDog

Easter Sunday29 March

Months of 3998

January31 days, starts Thursday

February28 days, starts Sunday

March31 days, starts Sunday

April30 days, starts Wednesday

May31 days, starts Friday

June30 days, starts Monday

July31 days, starts Wednesday

August31 days, starts Saturday

September30 days, starts Tuesday

October31 days, starts Thursday

November30 days, starts Sunday

December31 days, starts Tuesday

Time references

These values depend on today’s date and change daily.

Unix timestamp at the start63,997,516,800

Unix timestamp at the end64,029,052,799

Years from now1,972 years from now

Days from today720,007 days to 1 January

The number 3998

As a number3,998

In wordsthree thousand, nine hundred and ninety-eight

Roman numeralsMMMCMXCVIII

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Neighbouring years

Key dates

Also reads as

#339999 (colour)

#339999
Cyan
Dark
Nearest: Dark cyan

#339999 is a cyan with RGB values 51, 153, 153 and HSL 180°, 50%, 40%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Dark cyan.

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Colour values

#339999#339999

HEX#339999

HEX (short)#399

RGBrgb(51, 153, 153)

RGB (0–1)0.2, 0.6, 0.6

RGB percentages20%, 60%, 60%

HSLhsl(180, 50%, 40%)

HSV / HSBhsv(180, 66.7%, 60%)

CMYK66.7%, 0%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,381,657

CSS custom property--colour: #339999;

Brightness & contrast

Relative luminance0.25786WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.16:1

Contrast with white3.41:1WCAG normal text: Fail

Contrast with black6.16:1WCAG normal text: AA

Greyscale equivalent#838383

Inverted#CC6666

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#8F9299no red cones; affects about 1% of men; ΔE 29.2 from the original

Deuteranopia#7F869Ano green cones; the most common form, about 1% of men; ΔE 30.5 from the original

Tritanopia#009E99no blue cones; rare, and affects men and women equally; ΔE 6.9 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text3.41:1WCAG large text: AA

Contrast with black, large text6.16:1WCAG large text: AAA

Named colours

Dark cyan · ΔE 6 Cadetblue · ΔE 9.5 Teal · ΔE 9.6 Light seagreen · ΔE 12.3 Medium turquoise · ΔE 21 Dark turquoise · ΔE 21.5

Nearest named CSS colourDark cyan (#008B8B)ΔE 6.04, clearly different but related

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#993333

Analogous#339966, #336699

Triadic#993399, #999933

Split complementary#993366, #996633

Tetradic#663399, #993333, #669933

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#B3E6E6

Lighter +30%#8CD9D9

Lighter +20%#66CCCC

Lighter +10%#40BFBF

Darker −10%#267373

Darker −20%#1A4D4D

Darker −30%#0D2626

Darker −40%#000000

More saturated +25%#19B3B3

Less saturated −25%#4D8080

Channel breakdown

R51

G153

B153

Red51 (20%)

Green153 (60%)

Blue153 (60%)

Hue180°

Saturation (HSL)50%

Lightness40%

Dominant channelGreen and Blue

Hex per channelR 33 · G 99 · B 99

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3,998

Number properties

Factors & divisors

Arithmetic

Representations

Nearest landmarks

Powers & multiples

Divisibility tests

Collatz (3n + 1) trajectory

As a percentage & fraction

Read another way

Keep nerding

Neighbouring numbers

Derived from 3,998

Nearby primes

Other readings

3998 (year)

Structure of the year

Months of 3998

Time references

The number 3998

Keep nerding

Neighbouring years

Key dates

#339999 (colour)

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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