# 21428742

## 21,428,742 is an even composite number composed of three prime numbers multiplied together.

What does the number 21428742 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

21428742 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 21428742:

### 2 × 3 × 3571457

See below for interesting mathematical facts about the number 21428742 from the Numbermatics database.

### Names of 21428742

• Cardinal: 21428742 can be written as Twenty-one million, four hundred twenty-eight thousand, seven hundred forty-two.

### Scientific notation

• Scientific notation: 2.1428742 × 107

### Factors of 21428742

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3571462

### Divisors of 21428742

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 42857496
• Sum of proper divisors (its aliquot sum) s(n): 21428754
• 21428742 is an abundant number, because the sum of its proper divisors (21428754) is greater than itself. Its abundance is 12

### Bases of 21428742

• Binary: 10100011011111010000001102
• Base-36: CRAIU

### Squares and roots of 21428742

• 21428742 squared (214287422) is 459190983702564
• 21428742 cubed (214287423) is 9839885118488448694488
• The square root of 21428742 is 4629.1189226461
• The cube root of 21428742 is 277.7573491229

### Scales and comparisons

How big is 21428742?
• 21,428,742 seconds is equal to 35 weeks, 3 days, 25 minutes, 42 seconds.
• To count from 1 to 21,428,742 would take you about thirty-eight 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 21428742 cubic inches would be around 23.1 feet tall.

### Recreational maths with 21428742

• 21428742 backwards is 24782412
• The number of decimal digits it has is: 8
• The sum of 21428742's digits is 30
• More coming soon!

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The information we have on file for 21428742 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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