198721

198,721 is an odd composite number composed of two prime numbers multiplied together.

What does the number 198721 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

198721 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 198721:

19 × 10459

See below for interesting mathematical facts about the number 198721 from the Numbermatics database.


Names of 198721

  • Cardinal: 198721 can be written as One hundred ninety-eight thousand, seven hundred twenty-one.

Scientific notation

  • Scientific notation: 1.98721 × 105

Factors of 198721

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 10478

Divisors of 198721

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 209200
  • Sum of proper divisors (its aliquot sum) s(n): 10479
  • 198721 is a deficient number, because the sum of its proper divisors (10479) is less than itself. Its deficiency is 188242

Bases of 198721

  • Binary: 1100001000010000012
  • Hexadecimal: 0x30841
  • Base-36: 49C1

Squares and roots of 198721

  • 198721 squared (1987212) is 39490035841
  • 198721 cubed (1987213) is 7847499412359361
  • The square root of 198721 is 445.7813365317
  • The cube root of 198721 is 58.3554274583

Scales and comparisons

How big is 198721?
  • 198,721 seconds is equal to 2 days, 7 hours, 12 minutes, 1 second.
  • To count from 1 to 198,721 would take you about two 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 198721 cubic inches would be around 4.9 feet tall.

Recreational maths with 198721

  • 198721 backwards is 127891
  • The number of decimal digits it has is: 6
  • The sum of 198721's digits is 28
  • More coming soon!

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"Number 198721 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 198721 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/198721/

Chicago style:
Numbermatics. 2024. "Number 198721 - Facts about the integer". https://numbermatics.com/n/198721/

The information we have on file for 198721 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!

Keywords: Divisors of 198721, math, Factors of 198721, curriculum, school, college, exams, university, Prime factorization of 198721, STEM, science, technology, engineering, physics, economics, calculator, one hundred ninety-eight thousand, seven hundred twenty-one.

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