# 816

## 816 is an even composite number composed of three prime numbers multiplied together.

What does the number 816 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

816 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

## Prime factorization of 816:

### 24 × 3 × 17

(2 × 2 × 2 × 2 × 3 × 17)

See below for interesting mathematical facts about the number 816 from the Numbermatics database.

### Names of 816

• Cardinal: 816 can be written as Eight hundred sixteen.

### Scientific notation

• Scientific notation: 8.16 × 102

### Factors of 816

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 22

### Divisors of 816

• Number of divisors d(n): 20
• Complete list of divisors:
• Sum of all divisors σ(n): 2232
• Sum of proper divisors (its aliquot sum) s(n): 1416
• 816 is an abundant number, because the sum of its proper divisors (1416) is greater than itself. Its abundance is 600

### Bases of 816

• Binary: 11001100002
• Base-36: MO

### Squares and roots of 816

• 816 squared (8162) is 665856
• 816 cubed (8163) is 543338496
• The square root of 816 is 28.5657137141
• The cube root of 816 is 9.3446574567

### Scales and comparisons

How big is 816?
• 816 seconds is equal to 13 minutes, 36 seconds.
• To count from 1 to 816 would take you about six 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 816 cubic inches would be around 0.8 feet tall.

### Recreational maths with 816

• 816 backwards is 618
• The number of decimal digits it has is: 3
• The sum of 816's digits is 15
• More coming soon!

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The information we have on file for 816 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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