656

656 is an even composite number composed of two prime numbers multiplied together.

What does the number 656 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 10 divisors.

656 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of ten divisors.

Prime factorization of 656:

2⁴ × 41

(2 × 2 × 2 × 2 × 41)

See below for interesting mathematical facts about the number 656 from the Numbermatics database.

Names of 656

Cardinal: 656 can be written as Six hundred fifty-six.

Scientific notation

Scientific notation: 6.56 × 10²

Factors of 656

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 5
Sum of prime factors: 43

Divisors of 656

Number of divisors d(n): 10
Complete list of divisors:
1 2 4 8 16 41 82 164 328 656
Sum of all divisors σ(n): 1302
Sum of proper divisors (its aliquot sum) s(n): 646
656 is a deficient number, because the sum of its proper divisors (646) is less than itself. Its deficiency is 10

Bases of 656

Binary: 1010010000₂
Hexadecimal: 0x290
Base-36: I8

Squares and roots of 656

656 squared (656²) is 430336
656 cubed (656³) is 282300416
The square root of 656 is 25.6124969495
The cube root of 656 is 8.6889629715

Scales and comparisons

How big is 656?

656 seconds is equal to 10 minutes, 56 seconds.
To count from 1 to 656 would take you about five minutes.

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 656 cubic inches would be around 0.7 feet tall.

Recreational maths with 656

656 is the same when its digits are reversed! That makes it a palindromic number.
The number of decimal digits it has is: 3
The sum of 656's digits is 17
More coming soon!

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The information we have on file for 656 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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