681728

681,728 is an even composite number composed of two prime numbers multiplied together.

What does the number 681728 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 18 divisors.

681728 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of eighteen divisors.

Prime factorization of 681728:

2⁸ × 2663

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2663)

See below for interesting mathematical facts about the number 681728 from the Numbermatics database.

Names of 681728

Cardinal: 681728 can be written as Six hundred eighty-one thousand, seven hundred twenty-eight.

Scientific notation

Scientific notation: 6.81728 × 10⁵

Factors of 681728

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 9
Sum of prime factors: 2665

Divisors of 681728

Number of divisors d(n): 18
Complete list of divisors:
1 2 4 8 16 32 64 128 256 2663 5326 10652 21304 42608 85216 170432 340864 681728
Sum of all divisors σ(n): 1361304
Sum of proper divisors (its aliquot sum) s(n): 679576
681728 is a deficient number, because the sum of its proper divisors (679576) is less than itself. Its deficiency is 2152

Bases of 681728

Binary: 10100110011100000000₂
Hexadecimal: 0xA6700
Base-36: EM0W

Squares and roots of 681728

681728 squared (681728²) is 464753065984
681728 cubed (681728³) is 316835178167140352
The square root of 681728 is 825.6682142363
The cube root of 681728 is 88.0110179043

Scales and comparisons

How big is 681728?

681,728 seconds is equal to 1 week, 21 hours, 22 minutes, 8 seconds.
To count from 1 to 681,728 would take you about twenty-one 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 681728 cubic inches would be around 7.3 feet tall.

Recreational maths with 681728

681728 backwards is 827186
681728 is a Harshad number.
The number of decimal digits it has is: 6
The sum of 681728's digits is 32
More coming soon!

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The information we have on file for 681728 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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