138728

138,728 is an even composite number composed of two prime numbers multiplied together.

What does the number 138728 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.

138728 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 138728:

2³ × 17341

(2 × 2 × 2 × 17341)

See below for interesting mathematical facts about the number 138728 from the Numbermatics database.

Names of 138728

Cardinal: 138728 can be written as One hundred thirty-eight thousand, seven hundred twenty-eight.

Scientific notation

Scientific notation: 1.38728 × 10⁵

Factors of 138728

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 4
Sum of prime factors: 17343

Divisors of 138728

Number of divisors d(n): 8
Complete list of divisors:
1 2 4 8 17341 34682 69364 138728
Sum of all divisors σ(n): 260130
Sum of proper divisors (its aliquot sum) s(n): 121402
138728 is a deficient number, because the sum of its proper divisors (121402) is less than itself. Its deficiency is 17326

Bases of 138728

Binary: 100001110111101000₂
Hexadecimal: 0x21DE8
Base-36: 2Z1K

Squares and roots of 138728

138728 squared (138728²) is 19245457984
138728 cubed (138728³) is 2669883895204352
The square root of 138728 is 372.4620786065
The cube root of 138728 is 51.7672039387

Scales and comparisons

How big is 138728?

138,728 seconds is equal to 1 day, 14 hours, 32 minutes, 8 seconds.
To count from 1 to 138,728 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 138728 cubic inches would be around 4.3 feet tall.

Recreational maths with 138728

138728 backwards is 827831
The number of decimal digits it has is: 6
The sum of 138728's digits is 29
More coming soon!

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The information we have on file for 138728 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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