138905

138,905 is an odd composite number composed of three prime numbers multiplied together.

What does the number 138905 look like?

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

138905 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 138905:

5 × 13 × 2137

See below for interesting mathematical facts about the number 138905 from the Numbermatics database.


Names of 138905

  • Cardinal: 138905 can be written as One hundred thirty-eight thousand, nine hundred five.

Scientific notation

  • Scientific notation: 1.38905 × 105

Factors of 138905

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 2155

Divisors of 138905

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 179592
  • Sum of proper divisors (its aliquot sum) s(n): 40687
  • 138905 is a deficient number, because the sum of its proper divisors (40687) is less than itself. Its deficiency is 98218

Bases of 138905

  • Binary: 1000011110100110012
  • Hexadecimal: 0x21E99
  • Base-36: 2Z6H

Squares and roots of 138905

  • 138905 squared (1389052) is 19294599025
  • 138905 cubed (1389053) is 2680116277567625
  • The square root of 138905 is 372.6996109469
  • The cube root of 138905 is 51.7892107939

Scales and comparisons

How big is 138905?
  • 138,905 seconds is equal to 1 day, 14 hours, 35 minutes, 5 seconds.
  • To count from 1 to 138,905 would take you about fourteen 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 138905 cubic inches would be around 4.3 feet tall.

Recreational maths with 138905

  • 138905 backwards is 509831
  • The number of decimal digits it has is: 6
  • The sum of 138905's digits is 26
  • More coming soon!

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"Number 138905 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 138905 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/138905/

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Numbermatics. 2024. "Number 138905 - Facts about the integer". https://numbermatics.com/n/138905/

The information we have on file for 138905 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 138905, math, Factors of 138905, curriculum, school, college, exams, university, Prime factorization of 138905, STEM, science, technology, engineering, physics, economics, calculator, one hundred thirty-eight thousand, nine hundred five.

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