# 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:
• 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
• 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!