21697290

21,697,290 is an even composite number composed of four prime numbers multiplied together.

What does the number 21697290 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 36 divisors.

21697290 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-six divisors.

Prime factorization of 21697290:

2 × 3² × 5 × 491²

(2 × 3 × 3 × 5 × 491 × 491)

See below for interesting mathematical facts about the number 21697290 from the Numbermatics database.

Names of 21697290

Cardinal: 21697290 can be written as Twenty-one million, six hundred ninety-seven thousand, two hundred ninety.

Scientific notation

Scientific notation: 2.169729 × 10⁷

Factors of 21697290

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 501

Divisors of 21697290

Number of divisors d(n): 36
Complete list of divisors:
1 2 3 5 6 9 10 15 18 30 45 90 491 982 1473 2455 2946 4419 4910 7365 8838 14730 22095 44190 241081 482162 723243 1205405 1446486 2169729 2410810 3616215 4339458 7232430 10848645 21697290
Sum of all divisors σ(n): 56528082
Sum of proper divisors (its aliquot sum) s(n): 34830792
21697290 is an abundant number, because the sum of its proper divisors (34830792) is greater than itself. Its abundance is 13133502

Bases of 21697290

Binary: 1010010110001001100001010₂
Hexadecimal: 0x14B130A
Base-36: CX1QI

Squares and roots of 21697290

21697290 squared (21697290²) is 470772393344100
21697290 cubed (21697290³) is 10214485142381007489000
The square root of 21697290 is 4658.0349934281
The cube root of 21697290 is 278.9128336017

Scales and comparisons

How big is 21697290?

21,697,290 seconds is equal to 35 weeks, 6 days, 3 hours, 1 minute, 30 seconds.
To count from 1 to 21,697,290 would take you about five days!

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 21697290 cubic inches would be around 23.2 feet tall.

Recreational maths with 21697290

21697290 backwards is 09279612
The number of decimal digits it has is: 8
The sum of 21697290's digits is 36
More coming soon!

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The information we have on file for 21697290 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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