18939

Names of 18939

• Cardinal: 18939 can be written as Eighteen thousand, nine hundred thirty-nine.

Scientific notation

• Scientific notation: 1.8939 × 10⁴

Factors of 18939

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 169

Divisors of 18939

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 59 107 177 321 6313 18939
• Sum of all divisors σ(n): 25920
• Sum of proper divisors (its aliquot sum) s(n): 6981
• 18939 is a deficient number, because the sum of its proper divisors (6981) is less than itself. Its deficiency is 11958

Bases of 18939

• Binary: 100100111111011₂
• Hexadecimal: 0x49FB
• Base-36: EM3

Squares and roots of 18939

• 18939 squared (18939²) is 358685721
• 18939 cubed (18939³) is 6793148870019
• The square root of 18939 is 137.6190393805
• The cube root of 18939 is 26.6554292929

Scales and comparisons

• 18,939 seconds is equal to 5 hours, 15 minutes, 39 seconds.
• To count from 1 to 18,939 would take you about five 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 18939 cubic inches would be around 2.2 feet tall.

Recreational maths with 18939

• 18939 backwards is 93981
• The number of decimal digits it has is: 5
• The sum of 18939's digits is 30
• More coming soon!