15856

15,856 is an even composite number composed of two prime numbers multiplied together.

What does the number 15856 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 10 divisors.

15856 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of ten divisors.

Prime factorization of 15856:

2⁴ × 991

(2 × 2 × 2 × 2 × 991)

See below for interesting mathematical facts about the number 15856 from the Numbermatics database.

Names of 15856

Cardinal: 15856 can be written as Fifteen thousand, eight hundred fifty-six.

Scientific notation

Scientific notation: 1.5856 × 10⁴

Factors of 15856

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 5
Sum of prime factors: 993

Divisors of 15856

Number of divisors d(n): 10
Complete list of divisors:
1 2 4 8 16 991 1982 3964 7928 15856
Sum of all divisors σ(n): 30752
Sum of proper divisors (its aliquot sum) s(n): 14896
15856 is a deficient number, because the sum of its proper divisors (14896) is less than itself. Its deficiency is 960

Bases of 15856

Binary: 11110111110000₂
Hexadecimal: 0x3DF0
Base-36: C8G

Squares and roots of 15856

15856 squared (15856²) is 251412736
15856 cubed (15856³) is 3986400342016
The square root of 15856 is 125.9206099095
The cube root of 15856 is 25.1225978083

Scales and comparisons

How big is 15856?

15,856 seconds is equal to 4 hours, 24 minutes, 16 seconds.
To count from 1 to 15,856 would take you about four 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 15856 cubic inches would be around 2.1 feet tall.

Recreational maths with 15856

15856 backwards is 65851
The number of decimal digits it has is: 5
The sum of 15856's digits is 25
More coming soon!

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The information we have on file for 15856 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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