29991

Names of 29991

• Cardinal: 29991 can be written as Twenty-nine thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 2.9991 × 10⁴

Factors of 29991

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 785

Divisors of 29991

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 13 39 769 2307 9997 29991
• Sum of all divisors σ(n): 43120
• Sum of proper divisors (its aliquot sum) s(n): 13129
• 29991 is a deficient number, because the sum of its proper divisors (13129) is less than itself. Its deficiency is 16862

Bases of 29991

• Binary: 111010100100111₂
• Hexadecimal: 0x7527
• Base-36: N53

Squares and roots of 29991

• 29991 squared (29991²) is 899460081
• 29991 cubed (29991³) is 26975707289271
• The square root of 29991 is 173.1790980459
• The cube root of 29991 is 31.0692175161

Scales and comparisons

• 29,991 seconds is equal to 8 hours, 19 minutes, 51 seconds.
• To count from 1 to 29,991 would take you about eight 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 29991 cubic inches would be around 2.6 feet tall.

Recreational maths with 29991

• 29991 backwards is 19992
• The number of decimal digits it has is: 5
• The sum of 29991's digits is 30
• More coming soon!