13805

13,805 is an odd composite number composed of three prime numbers multiplied together.

What does the number 13805 look like?

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

13805 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 13805:

5 × 11 × 251

See below for interesting mathematical facts about the number 13805 from the Numbermatics database.


Names of 13805

  • Cardinal: 13805 can be written as Thirteen thousand, eight hundred five.

Scientific notation

  • Scientific notation: 1.3805 × 104

Factors of 13805

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 267

Divisors of 13805

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 18144
  • Sum of proper divisors (its aliquot sum) s(n): 4339
  • 13805 is a deficient number, because the sum of its proper divisors (4339) is less than itself. Its deficiency is 9466

Bases of 13805

  • Binary: 110101111011012
  • Hexadecimal: 0x35ED
  • Base-36: ANH

Squares and roots of 13805

  • 13805 squared (138052) is 190578025
  • 13805 cubed (138053) is 2630929635125
  • The square root of 13805 is 117.4946807307
  • The cube root of 13805 is 23.9889995885

Scales and comparisons

How big is 13805?
  • 13,805 seconds is equal to 3 hours, 50 minutes, 5 seconds.
  • To count from 1 to 13,805 would take you about three 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 13805 cubic inches would be around 2 feet tall.

Recreational maths with 13805

  • 13805 backwards is 50831
  • The number of decimal digits it has is: 5
  • The sum of 13805's digits is 17
  • More coming soon!

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"Number 13805 - Facts about the integer". Numbermatics.com. 2021. Web. 27 November 2021.

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Numbermatics. (2021). Number 13805 - Facts about the integer. Retrieved 27 November 2021, from https://numbermatics.com/n/13805/

Chicago style:
Numbermatics. 2021. "Number 13805 - Facts about the integer". https://numbermatics.com/n/13805/

The information we have on file for 13805 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 13805, math, Factors of 13805, curriculum, school, college, exams, university, Prime factorization of 13805, STEM, science, technology, engineering, physics, economics, calculator, thirteen thousand, eight hundred five.

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