10991

10,991 is an odd composite number composed of two prime numbers multiplied together.

What does the number 10991 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

10991 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 10991:

29 × 379

See below for interesting mathematical facts about the number 10991 from the Numbermatics database.

Names of 10991

Cardinal: 10991 can be written as Ten thousand, nine hundred ninety-one.

Scientific notation

Scientific notation: 1.0991 × 10⁴

Factors of 10991

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 408

Divisors of 10991

Number of divisors d(n): 4
Complete list of divisors:
1 29 379 10991
Sum of all divisors σ(n): 11400
Sum of proper divisors (its aliquot sum) s(n): 409
10991 is a deficient number, because the sum of its proper divisors (409) is less than itself. Its deficiency is 10582

Bases of 10991

Binary: 10101011101111₂
Hexadecimal: 0x2AEF
Base-36: 8HB

Squares and roots of 10991

10991 squared (10991²) is 120802081
10991 cubed (10991³) is 1327735672271
The square root of 10991 is 104.8379702207
The cube root of 10991 is 22.2337338505

Scales and comparisons

How big is 10991?

10,991 seconds is equal to 3 hours, 3 minutes, 11 seconds.
To count from 1 to 10,991 would take you about three 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 10991 cubic inches would be around 1.9 feet tall.

Recreational maths with 10991

10991 backwards is 19901
The number of decimal digits it has is: 5
The sum of 10991's digits is 20
More coming soon!

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The information we have on file for 10991 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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