21439856

21,439,856 is an even composite number composed of three prime numbers multiplied together.

What does the number 21439856 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

21439856 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

Prime factorization of 21439856:

2⁴ × 17 × 78823

(2 × 2 × 2 × 2 × 17 × 78823)

See below for interesting mathematical facts about the number 21439856 from the Numbermatics database.

Names of 21439856

Cardinal: 21439856 can be written as Twenty-one million, four hundred thirty-nine thousand, eight hundred fifty-six.

Scientific notation

Scientific notation: 2.1439856 × 10⁷

Factors of 21439856

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 6
Sum of prime factors: 78842

Divisors of 21439856

Number of divisors d(n): 20
Complete list of divisors:
1 2 4 8 16 17 34 68 136 272 78823 157646 315292 630584 1261168 1339991 2679982 5359964 10719928 21439856
Sum of all divisors σ(n): 43983792
Sum of proper divisors (its aliquot sum) s(n): 22543936
21439856 is an abundant number, because the sum of its proper divisors (22543936) is greater than itself. Its abundance is 1104080

Bases of 21439856

Binary: 1010001110010010101110000₂
Hexadecimal: 0x1472570
Base-36: CRJ3K

Squares and roots of 21439856

21439856 squared (21439856²) is 459667425300736
21439856 cubed (21439856³) is 9855203406338536534016
The square root of 21439856 is 4630.3192114583
The cube root of 21439856 is 277.8053603663

Scales and comparisons

How big is 21439856?

21,439,856 seconds is equal to 35 weeks, 3 days, 3 hours, 30 minutes, 56 seconds.
To count from 1 to 21,439,856 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 21439856 cubic inches would be around 23.2 feet tall.

Recreational maths with 21439856

21439856 backwards is 65893412
The number of decimal digits it has is: 8
The sum of 21439856's digits is 38
More coming soon!

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The information we have on file for 21439856 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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