21428840

21,428,840 is an even composite number composed of four prime numbers multiplied together.

What does the number 21428840 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 32 divisors.

21428840 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 21428840:

2³ × 5 × 17 × 31513

(2 × 2 × 2 × 5 × 17 × 31513)

See below for interesting mathematical facts about the number 21428840 from the Numbermatics database.

Names of 21428840

Cardinal: 21428840 can be written as Twenty-one million, four hundred twenty-eight thousand, eight hundred forty.

Scientific notation

Scientific notation: 2.142884 × 10⁷

Factors of 21428840

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 31537

Divisors of 21428840

Number of divisors d(n): 32
Complete list of divisors:
1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 31513 63026 126052 157565 252104 315130 535721 630260 1071442 1260520 2142884 2678605 4285768 5357210 10714420 21428840
Sum of all divisors σ(n): 51052680
Sum of proper divisors (its aliquot sum) s(n): 29623840
21428840 is an abundant number, because the sum of its proper divisors (29623840) is greater than itself. Its abundance is 8195000

Bases of 21428840

Binary: 1010001101111101001101000₂
Hexadecimal: 0x146FA68
Base-36: CRALK

Squares and roots of 21428840

21428840 squared (21428840²) is 459195183745600
21428840 cubed (21428840³) is 9840020121255063104000
The square root of 21428840 is 4629.1295078017
The cube root of 21428840 is 277.7577725445

Scales and comparisons

How big is 21428840?

21,428,840 seconds is equal to 35 weeks, 3 days, 27 minutes, 20 seconds.
To count from 1 to 21,428,840 would take you about forty-one 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 21428840 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428840

21428840 backwards is 04882412
The number of decimal digits it has is: 8
The sum of 21428840's digits is 29
More coming soon!

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The information we have on file for 21428840 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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