# 870

## 870 is an even composite number composed of four prime numbers multiplied together.

What does the number 870 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

870 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

## Prime factorization of 870:

### 2 × 3 × 5 × 29

See below for interesting mathematical facts about the number 870 from the Numbermatics database.

### Names of 870

• Cardinal: 870 can be written as Eight hundred seventy.

### Scientific notation

• Scientific notation: 8.7 × 102

### Factors of 870

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 39

### Divisors of 870

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 2160
• Sum of proper divisors (its aliquot sum) s(n): 1290
• 870 is an abundant number, because the sum of its proper divisors (1290) is greater than itself. Its abundance is 420

### Bases of 870

• Binary: 11011001102
• Base-36: O6

### Squares and roots of 870

• 870 squared (8702) is 756900
• 870 cubed (8703) is 658503000
• The square root of 870 is 29.4957624075
• The cube root of 870 is 9.5464027093

### Scales and comparisons

How big is 870?
• 870 seconds is equal to 14 minutes, 30 seconds.
• To count from 1 to 870 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 870 cubic inches would be around 0.8 feet tall.

### Recreational maths with 870

• 870 backwards is 078
• 870 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 870's digits is 15
• More coming soon!