138805

138,805 is an odd composite number composed of four prime numbers multiplied together.

What does the number 138805 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

138805 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 138805:

5 × 17 × 23 × 71

See below for interesting mathematical facts about the number 138805 from the Numbermatics database.

Names of 138805

Cardinal: 138805 can be written as One hundred thirty-eight thousand, eight hundred five.

Scientific notation

Scientific notation: 1.38805 × 10⁵

Factors of 138805

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 116

Divisors of 138805

Number of divisors d(n): 16
Complete list of divisors:
1 5 17 23 71 85 115 355 391 1207 1633 1955 6035 8165 27761 138805
Sum of all divisors σ(n): 186624
Sum of proper divisors (its aliquot sum) s(n): 47819
138805 is a deficient number, because the sum of its proper divisors (47819) is less than itself. Its deficiency is 90986

Bases of 138805

Binary: 100001111000110101₂
Hexadecimal: 0x21E35
Base-36: 2Z3P

Squares and roots of 138805

138805 squared (138805²) is 19266828025
138805 cubed (138805³) is 2674332064010125
The square root of 138805 is 372.5654304951
The cube root of 138805 is 51.7767798413

Scales and comparisons

How big is 138805?

138,805 seconds is equal to 1 day, 14 hours, 33 minutes, 25 seconds.
To count from 1 to 138,805 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 138805 cubic inches would be around 4.3 feet tall.

Recreational maths with 138805

138805 backwards is 508831
The number of decimal digits it has is: 6
The sum of 138805's digits is 25
More coming soon!

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The information we have on file for 138805 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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