81280

81,280 is an even composite number composed of three prime numbers multiplied together.

What does the number 81280 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 32 divisors.

81280 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 81280:

2⁷ × 5 × 127

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 127)

See below for interesting mathematical facts about the number 81280 from the Numbermatics database.

Names of 81280

Cardinal: 81280 can be written as Eighty-one thousand, two hundred eighty.

Scientific notation

Scientific notation: 8.128 × 10⁴

Factors of 81280

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 9
Sum of prime factors: 134

Divisors of 81280

Number of divisors d(n): 32
Complete list of divisors:
1 2 4 5 8 10 16 20 32 40 64 80 127 128 160 254 320 508 635 640 1016 1270 2032 2540 4064 5080 8128 10160 16256 20320 40640 81280
Sum of all divisors σ(n): 195840
Sum of proper divisors (its aliquot sum) s(n): 114560
81280 is an abundant number, because the sum of its proper divisors (114560) is greater than itself. Its abundance is 33280

Bases of 81280

Binary: 10011110110000000₂
Hexadecimal: 0x13D80
Base-36: 1QPS

Squares and roots of 81280

81280 squared (81280²) is 6606438400
81280 cubed (81280³) is 536971313152000
The square root of 81280 is 285.0964748993
The cube root of 81280 is 43.3172853133

Scales and comparisons

How big is 81280?

81,280 seconds is equal to 22 hours, 34 minutes, 40 seconds.
To count from 1 to 81,280 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 81280 cubic inches would be around 3.6 feet tall.

Recreational maths with 81280

81280 backwards is 08218
The number of decimal digits it has is: 5
The sum of 81280's digits is 19
More coming soon!

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The information we have on file for 81280 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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