# 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:
• 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
• 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!