21,790 is an even composite number composed of three prime numbers multiplied together.

What does the number 21790 look like?

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

21790 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 21790:

2 × 5 × 2179

See below for interesting mathematical facts about the number 21790 from the Numbermatics database.

Names of 21790

  • Cardinal: 21790 can be written as Twenty-one thousand, seven hundred ninety.

Scientific notation

  • Scientific notation: 2.179 × 104

Factors of 21790

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 2186

Divisors of 21790

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 39240
  • Sum of proper divisors (its aliquot sum) s(n): 17450
  • 21790 is a deficient number, because the sum of its proper divisors (17450) is less than itself. Its deficiency is 4340

Bases of 21790

  • Binary: 1010101000111102
  • Hexadecimal: 0x551E
  • Base-36: GTA

Squares and roots of 21790

  • 21790 squared (217902) is 474804100
  • 21790 cubed (217903) is 10345981339000
  • The square root of 21790 is 147.6143624449
  • The cube root of 21790 is 27.9309523183

Scales and comparisons

How big is 21790?
  • 21,790 seconds is equal to 6 hours, 3 minutes, 10 seconds.
  • To count from 1 to 21,790 would take you about six 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 21790 cubic inches would be around 2.3 feet tall.

Recreational maths with 21790

  • 21790 backwards is 09712
  • The number of decimal digits it has is: 5
  • The sum of 21790's digits is 19
  • More coming soon!

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The information we have on file for 21790 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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