138915

138,915 is an odd composite number composed of three prime numbers multiplied together.

What does the number 138915 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 40 divisors.

138915 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of forty divisors.

Prime factorization of 138915:

3⁴ × 5 × 7³

(3 × 3 × 3 × 3 × 5 × 7 × 7 × 7)

See below for interesting mathematical facts about the number 138915 from the Numbermatics database.

Names of 138915

Cardinal: 138915 can be written as One hundred thirty-eight thousand, nine hundred fifteen.

Scientific notation

Scientific notation: 1.38915 × 10⁵

Factors of 138915

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 8
Sum of prime factors: 15

Divisors of 138915

Number of divisors d(n): 40
Complete list of divisors:
1 3 5 7 9 15 21 27 35 45 49 63 81 105 135 147 189 245 315 343 405 441 567 735 945 1029 1323 1715 2205 2835 3087 3969 5145 6615 9261 15435 19845 27783 46305 138915
Sum of all divisors σ(n): 290400
Sum of proper divisors (its aliquot sum) s(n): 151485
138915 is an abundant number, because the sum of its proper divisors (151485) is greater than itself. Its abundance is 12570

Bases of 138915

Binary: 100001111010100011₂
Hexadecimal: 0x21EA3
Base-36: 2Z6R

Squares and roots of 138915

138915 squared (138915²) is 19297377225
138915 cubed (138915³) is 2680695157210875
The square root of 138915 is 372.7130263353
The cube root of 138915 is 51.7904535609

Scales and comparisons

How big is 138915?

138,915 seconds is equal to 1 day, 14 hours, 35 minutes, 15 seconds.
To count from 1 to 138,915 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 138915 cubic inches would be around 4.3 feet tall.

Recreational maths with 138915

138915 backwards is 519831
138915 is a Harshad number.
The number of decimal digits it has is: 6
The sum of 138915's digits is 27
More coming soon!

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The information we have on file for 138915 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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