639990

639,990 is an even composite number composed of five prime numbers multiplied together.

What does the number 639990 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 48 divisors.

639990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 639990:

2 × 3² × 5 × 13 × 547

(2 × 3 × 3 × 5 × 13 × 547)

See below for interesting mathematical facts about the number 639990 from the Numbermatics database.

Names of 639990

Cardinal: 639990 can be written as Six hundred thirty-nine thousand, nine hundred ninety.

Scientific notation

Scientific notation: 6.3999 × 10⁵

Factors of 639990

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 570

Divisors of 639990

Number of divisors d(n): 48
Complete list of divisors:
1 2 3 5 6 9 10 13 15 18 26 30 39 45 65 78 90 117 130 195 234 390 547 585 1094 1170 1641 2735 3282 4923 5470 7111 8205 9846 14222 16410 21333 24615 35555 42666 49230 63999 71110 106665 127998 213330 319995 639990
Sum of all divisors σ(n): 1795248
Sum of proper divisors (its aliquot sum) s(n): 1155258
639990 is an abundant number, because the sum of its proper divisors (1155258) is greater than itself. Its abundance is 515268

Bases of 639990

Binary: 10011100001111110110₂
Hexadecimal: 0x9C3F6
Base-36: DPTI

Squares and roots of 639990

639990 squared (639990²) is 409587200100
639990 cubed (639990³) is 262131712191999000
The square root of 639990 is 799.9937499755
The cube root of 639990 is 86.1769387583

Scales and comparisons

How big is 639990?

639,990 seconds is equal to 1 week, 9 hours, 46 minutes, 30 seconds.
To count from 1 to 639,990 would take you about nine hours!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 639990 cubic inches would be around 7.2 feet tall.

Recreational maths with 639990

639990 backwards is 099936
The number of decimal digits it has is: 6
The sum of 639990's digits is 36
More coming soon!

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The information we have on file for 639990 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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