# 520

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

What does the number 520 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

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

## Prime factorization of 520:

### 23 × 5 × 13

(2 × 2 × 2 × 5 × 13)

See below for interesting mathematical facts about the number 520 from the Numbermatics database.

### Names of 520

• Cardinal: 520 can be written as Five hundred twenty.

### Scientific notation

• Scientific notation: 5.2 × 102

### Factors of 520

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 20

### Divisors of 520

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 1260
• Sum of proper divisors (its aliquot sum) s(n): 740
• 520 is an abundant number, because the sum of its proper divisors (740) is greater than itself. Its abundance is 220

### Bases of 520

• Binary: 10000010002
• Base-36: EG

### Squares and roots of 520

• 520 squared (5202) is 270400
• 520 cubed (5203) is 140608000
• The square root of 520 is 22.8035085019
• The cube root of 520 is 8.0414515171

### Scales and comparisons

How big is 520?
• 520 seconds is equal to 8 minutes, 40 seconds.
• To count from 1 to 520 would take you about four 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 520 cubic inches would be around 0.7 feet tall.

### Recreational maths with 520

• 520 backwards is 025
• The number of decimal digits it has is: 3
• The sum of 520's digits is 7
• More coming soon!