# 21840800

## 21,840,800 is an even composite number composed of four prime numbers multiplied together.

What does the number 21840800 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 72 divisors.

21840800 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.

## Prime factorization of 21840800:

### 25 × 52 × 23 × 1187

(2 × 2 × 2 × 2 × 2 × 5 × 5 × 23 × 1187)

See below for interesting mathematical facts about the number 21840800 from the Numbermatics database.

### Names of 21840800

• Cardinal: 21840800 can be written as Twenty-one million, eight hundred forty thousand, eight hundred.

### Scientific notation

• Scientific notation: 2.18408 × 107

### Factors of 21840800

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1217

### Divisors of 21840800

• Number of divisors d(n): 72
• Complete list of divisors:
• Sum of all divisors σ(n): 55683936
• Sum of proper divisors (its aliquot sum) s(n): 33843136
• 21840800 is an abundant number, because the sum of its proper divisors (33843136) is greater than itself. Its abundance is 12002336

### Bases of 21840800

• Binary: 10100110101000011101000002
• Base-36: D04GW

### Squares and roots of 21840800

• 21840800 squared (218408002) is 477020544640000
• 21840800 cubed (218408003) is 10418510311373312000000
• The square root of 21840800 is 4673.4141695339
• The cube root of 21840800 is 279.5264103103

### Scales and comparisons

How big is 21840800?
• 21,840,800 seconds is equal to 36 weeks, 18 hours, 53 minutes, 20 seconds.
• To count from 1 to 21,840,800 would take you about two weeks!

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 21840800 cubic inches would be around 23.3 feet tall.

### Recreational maths with 21840800

• 21840800 backwards is 00804812
• 21840800 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21840800's digits is 23
• More coming soon!