64640

64,640 is an even composite number composed of three prime numbers multiplied together.

What does the number 64640 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 32 divisors.

64640 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 64640:

2⁷ × 5 × 101

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 101)

See below for interesting mathematical facts about the number 64640 from the Numbermatics database.

Names of 64640

Cardinal: 64640 can be written as Sixty-four thousand, six hundred forty.

Scientific notation

Scientific notation: 6.464 × 10⁴

Factors of 64640

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 9
Sum of prime factors: 108

Divisors of 64640

Number of divisors d(n): 32
Complete list of divisors:
1 2 4 5 8 10 16 20 32 40 64 80 101 128 160 202 320 404 505 640 808 1010 1616 2020 3232 4040 6464 8080 12928 16160 32320 64640
Sum of all divisors σ(n): 156060
Sum of proper divisors (its aliquot sum) s(n): 91420
64640 is an abundant number, because the sum of its proper divisors (91420) is greater than itself. Its abundance is 26780

Bases of 64640

Binary: 1111110010000000₂
Hexadecimal: 0xFC80
Base-36: 1DVK

Squares and roots of 64640

64640 squared (64640²) is 4178329600
64640 cubed (64640³) is 270087225344000
The square root of 64640 is 254.2439773131
The cube root of 64640 is 40.1328913417

Scales and comparisons

How big is 64640?

64,640 seconds is equal to 17 hours, 57 minutes, 20 seconds.
To count from 1 to 64,640 would take you about seventeen 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 64640 cubic inches would be around 3.3 feet tall.

Recreational maths with 64640

64640 backwards is 04646
64640 is a Harshad number.
The number of decimal digits it has is: 5
The sum of 64640's digits is 20
More coming soon!

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The information we have on file for 64640 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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