812

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

What does the number 812 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

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

Prime factorization of 812:

2² × 7 × 29

(2 × 2 × 7 × 29)

See below for interesting mathematical facts about the number 812 from the Numbermatics database.

Names of 812

Cardinal: 812 can be written as Eight hundred twelve.

Scientific notation

Scientific notation: 8.12 × 10²

Factors of 812

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 38

Divisors of 812

Number of divisors d(n): 12
Complete list of divisors:
1 2 4 7 14 28 29 58 116 203 406 812
Sum of all divisors σ(n): 1680
Sum of proper divisors (its aliquot sum) s(n): 868
812 is an abundant number, because the sum of its proper divisors (868) is greater than itself. Its abundance is 56

Bases of 812

Binary: 1100101100₂
Hexadecimal: 0x32C
Base-36: MK

Squares and roots of 812

812 squared (812²) is 659344
812 cubed (812³) is 535387328
The square root of 812 is 28.4956136975
The cube root of 812 is 9.3293633907

Scales and comparisons

How big is 812?

812 seconds is equal to 13 minutes, 32 seconds.
To count from 1 to 812 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 812 cubic inches would be around 0.8 feet tall.

Recreational maths with 812

812 backwards is 218
The number of decimal digits it has is: 3
The sum of 812's digits is 11
More coming soon!

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The information we have on file for 812 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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