# 72900

## 72,900 is an even composite number composed of three prime numbers multiplied together.

What does the number 72900 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 63 divisors.

72900 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixty-three divisors.

## Prime factorization of 72900:

### 22 × 36 × 52

(2 × 2 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 5)

See below for interesting mathematical facts about the number 72900 from the Numbermatics database.

### Names of 72900

• Cardinal: 72900 can be written as Seventy-two thousand, nine hundred.

### Scientific notation

• Scientific notation: 7.29 × 104

### Factors of 72900

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

### Divisors of 72900

• Number of divisors d(n): 63
• Complete list of divisors:
• Sum of all divisors σ(n): 237181
• Sum of proper divisors (its aliquot sum) s(n): 164281
• 72900 is an abundant number, because the sum of its proper divisors (164281) is greater than itself. Its abundance is 91381

### Bases of 72900

• Binary: 100011100110001002
• Base-36: 1K90

### Squares and roots of 72900

• 72900 squared (729002) is 5314410000
• 72900 cubed (729003) is 387420489000000
• 72900 is a perfect square number. Its square root is 270
• The cube root of 72900 is 41.7742995029

### Scales and comparisons

How big is 72900?
• 72,900 seconds is equal to 20 hours, 15 minutes.
• To count from 1 to 72,900 would take you about twenty hours.

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 72900 cubic inches would be around 3.5 feet tall.

### Recreational maths with 72900

• 72900 backwards is 00927
• 72900 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 72900's digits is 18
• More coming soon!