728128

728,128 is an even composite number composed of three prime numbers multiplied together.

What does the number 728128 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 28 divisors.

728128 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty-eight divisors.

Prime factorization of 728128:

2⁶ × 31 × 367

(2 × 2 × 2 × 2 × 2 × 2 × 31 × 367)

See below for interesting mathematical facts about the number 728128 from the Numbermatics database.

Names of 728128

Cardinal: 728128 can be written as Seven hundred twenty-eight thousand, one hundred twenty-eight.

Scientific notation

Scientific notation: 7.28128 × 10⁵

Factors of 728128

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 8
Sum of prime factors: 400

Divisors of 728128

Number of divisors d(n): 28
Complete list of divisors:
1 2 4 8 16 31 32 62 64 124 248 367 496 734 992 1468 1984 2936 5872 11377 11744 22754 23488 45508 91016 182032 364064 728128
Sum of all divisors σ(n): 1495552
Sum of proper divisors (its aliquot sum) s(n): 767424
728128 is an abundant number, because the sum of its proper divisors (767424) is greater than itself. Its abundance is 39296

Bases of 728128

Binary: 10110001110001000000₂
Hexadecimal: 0xB1C40
Base-36: FLTS

Squares and roots of 728128

728128 squared (728128²) is 530170384384
728128 cubed (728128³) is 386031901640753152
The square root of 728128 is 853.3041661681
The cube root of 728128 is 89.9641009089

Scales and comparisons

How big is 728128?

728,128 seconds is equal to 1 week, 1 day, 10 hours, 15 minutes, 28 seconds.
To count from 1 to 728,128 would take you about ten 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 728128 cubic inches would be around 7.5 feet tall.

Recreational maths with 728128

728128 backwards is 821827
The number of decimal digits it has is: 6
The sum of 728128's digits is 28
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The information we have on file for 728128 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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