81389

81,389 is an odd composite number composed of three prime numbers multiplied together.

What does the number 81389 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

81389 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 81389:

7² × 11 × 151

(7 × 7 × 11 × 151)

See below for interesting mathematical facts about the number 81389 from the Numbermatics database.

Names of 81389

Cardinal: 81389 can be written as Eighty-one thousand, three hundred eighty-nine.

Scientific notation

Scientific notation: 8.1389 × 10⁴

Factors of 81389

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 169

Divisors of 81389

Number of divisors d(n): 12
Complete list of divisors:
1 7 11 49 77 151 539 1057 1661 7399 11627 81389
Sum of all divisors σ(n): 103968
Sum of proper divisors (its aliquot sum) s(n): 22579
81389 is a deficient number, because the sum of its proper divisors (22579) is less than itself. Its deficiency is 58810

Bases of 81389

Binary: 10011110111101101₂
Hexadecimal: 0x13DED
Base-36: 1QST

Squares and roots of 81389

81389 squared (81389²) is 6624169321
81389 cubed (81389³) is 539134516866869
The square root of 81389 is 285.2875742125
The cube root of 81389 is 43.3366401157

Scales and comparisons

How big is 81389?

81,389 seconds is equal to 22 hours, 36 minutes, 29 seconds.
To count from 1 to 81,389 would take you about twenty-two 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 81389 cubic inches would be around 3.6 feet tall.

Recreational maths with 81389

81389 backwards is 98318
The number of decimal digits it has is: 5
The sum of 81389's digits is 29
More coming soon!

Copy this link to share with anyone:

Share this page on social media:

Link to this page

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

<a href="https://numbermatics.com/n/81389/?utm_source=shared">Number 81389 - Facts about the integer</a>

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:

[url=https://numbermatics.com/n/81389/?utm_source=shared]Number 81389 - Facts about the integer[/url]

Cite this page

MLA style:
"Number 81389 - Facts about the integer". Numbermatics.com. 2024. Web. 27 April 2024.

APA style:
Numbermatics. (2024). Number 81389 - Facts about the integer. Retrieved 27 April 2024, from https://numbermatics.com/n/81389/

Chicago style:
Numbermatics. 2024. "Number 81389 - Facts about the integer". https://numbermatics.com/n/81389/

The information we have on file for 81389 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 81389, math, Factors of 81389, curriculum, school, college, exams, university, Prime factorization of 81389, STEM, science, technology, engineering, physics, economics, calculator, eighty-one thousand, three hundred eighty-nine.