# 720

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

What does the number 720 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 30 divisors.

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

## Prime factorization of 720:

### 24 × 32 × 5

(2 × 2 × 2 × 2 × 3 × 3 × 5)

See below for interesting mathematical facts about the number 720 from the Numbermatics database.

### Names of 720

• Cardinal: 720 can be written as Seven hundred twenty.

### Scientific notation

• Scientific notation: 7.2 × 102

### Factors of 720

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 10

### Divisors of 720

• Number of divisors d(n): 30
• Complete list of divisors:
• Sum of all divisors σ(n): 2418
• Sum of proper divisors (its aliquot sum) s(n): 1698
• 720 is an abundant number, because the sum of its proper divisors (1698) is greater than itself. Its abundance is 978

### Bases of 720

• Binary: 10110100002
• Base-36: K0

### Squares and roots of 720

• 720 squared (7202) is 518400
• 720 cubed (7203) is 373248000
• The square root of 720 is 26.8328157299
• The cube root of 720 is 8.9628094931

### Scales and comparisons

How big is 720?
• 720 seconds is equal to 12 minutes.
• To count from 1 to 720 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 720 cubic inches would be around 0.7 feet tall.

### Recreational maths with 720

• 720 backwards is 027
• 720 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 720's digits is 9
• More coming soon!