72120991

Names of 72120991

• Cardinal: 72120991 can be written as Seventy-two million, one hundred twenty thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 7.2120991 × 10⁷

Factors of 72120991

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 72120991

Divisors of 72120991

• Number of divisors d(n): 2
• Complete list of divisors:
  1 72120991
• Sum of all divisors σ(n): 72120992
• Sum of proper divisors (its aliquot sum) s(n): 1
• 72120991 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 72120990

Bases of 72120991

• Binary: 100010011000111101010011111₂
• Hexadecimal: 0x44C7A9F
• Base-36: 16XSWV

Squares and roots of 72120991

• 72120991 squared (72120991²) is 5201437342822081
• 72120991 cubed (72120991³) is 375132815788735218402271
• The square root of 72120991 is 8492.4078446575
• The cube root of 72120991 is 416.2496632967

Scales and comparisons

• 72,120,991 seconds is equal to 2 years, 15 weeks, 1 day, 17 hours, 36 minutes, 31 seconds.
• To count from 1 to 72,120,991 would take you about three years!

  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 72120991 cubic inches would be around 34.7 feet tall.

Recreational maths with 72120991

• 72120991 backwards is 19902127
• The number of decimal digits it has is: 8
• The sum of 72120991's digits is 31
• More coming soon!