# 19998720

## 19,998,720 is an even composite number composed of five prime numbers multiplied together.

What does the number 19998720 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 288 divisors.

19998720 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.

## Prime factorization of 19998720:

### 211 × 32 × 5 × 7 × 31

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 7 × 31)

See below for interesting mathematical facts about the number 19998720 from the Numbermatics database.

### Names of 19998720

• Cardinal: 19998720 can be written as Nineteen million, nine hundred ninety-eight thousand, seven hundred twenty.

### Scientific notation

• Scientific notation: 1.999872 × 107

### Factors of 19998720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 48

### Divisors of 19998720

• Number of divisors d(n): 288
• Complete list of divisors:
• Sum of all divisors σ(n): 81768960
• Sum of proper divisors (its aliquot sum) s(n): 61770240
• 19998720 is an abundant number, because the sum of its proper divisors (61770240) is greater than itself. Its abundance is 41771520

### Bases of 19998720

• Binary: 10011000100101000000000002
• Base-36: BWN40

### Squares and roots of 19998720

• 19998720 squared (199987202) is 399948801638400
• 19998720 cubed (199987203) is 7998464098301902848000
• The square root of 19998720 is 4471.9928443593
• The cube root of 19998720 is 271.4359707783

### Scales and comparisons

How big is 19998720?
• 19,998,720 seconds is equal to 33 weeks, 11 hours, 12 minutes.
• To count from 1 to 19,998,720 would take you about forty-nine 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 19998720 cubic inches would be around 22.6 feet tall.

### Recreational maths with 19998720

• 19998720 backwards is 02789991
• 19998720 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 19998720's digits is 45
• More coming soon!