# 856

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

What does the number 856 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.

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

## Prime factorization of 856:

### 23 × 107

(2 × 2 × 2 × 107)

See below for interesting mathematical facts about the number 856 from the Numbermatics database.

### Names of 856

• Cardinal: 856 can be written as Eight hundred fifty-six.

### Scientific notation

• Scientific notation: 8.56 × 102

### Factors of 856

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 109

### Divisors of 856

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 1620
• Sum of proper divisors (its aliquot sum) s(n): 764
• 856 is a deficient number, because the sum of its proper divisors (764) is less than itself. Its deficiency is 92

### Bases of 856

• Binary: 11010110002
• Hexadecimal: 0x358
• Base-36: NS

### Squares and roots of 856

• 856 squared (8562) is 732736
• 856 cubed (8563) is 627222016
• The square root of 856 is 29.2574776765
• The cube root of 856 is 9.4949187969

### Scales and comparisons

How big is 856?
• 856 seconds is equal to 14 minutes, 16 seconds.
• To count from 1 to 856 would take you about seven 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 856 cubic inches would be around 0.8 feet tall.

### Recreational maths with 856

• 856 backwards is 658
• The number of decimal digits it has is: 3
• The sum of 856's digits is 19
• More coming soon!

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The information we have on file for 856 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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