# 18240

## 18,240 is an even composite number composed of four prime numbers multiplied together.

What does the number 18240 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 56 divisors.

18240 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of fifty-six divisors.

## Prime factorization of 18240:

### 26 × 3 × 5 × 19

(2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 19)

See below for interesting mathematical facts about the number 18240 from the Numbermatics database.

### Names of 18240

• Cardinal: 18240 can be written as Eighteen thousand, two hundred forty.

### Scientific notation

• Scientific notation: 1.824 × 104

### Factors of 18240

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 29

### Divisors of 18240

• Number of divisors d(n): 56
• Complete list of divisors:
• Sum of all divisors σ(n): 60960
• Sum of proper divisors (its aliquot sum) s(n): 42720
• 18240 is an abundant number, because the sum of its proper divisors (42720) is greater than itself. Its abundance is 24480

### Bases of 18240

• Binary: 1000111010000002
• Base-36: E2O

### Squares and roots of 18240

• 18240 squared (182402) is 332697600
• 18240 cubed (182403) is 6068404224000
• The square root of 18240 is 135.0555441291
• The cube root of 18240 is 26.3233774609

### Scales and comparisons

How big is 18240?
• 18,240 seconds is equal to 5 hours, 4 minutes.
• To count from 1 to 18,240 would take you about five 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 18240 cubic inches would be around 2.2 feet tall.

### Recreational maths with 18240

• 18240 backwards is 04281
• 18240 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 18240's digits is 15
• More coming soon!