1218315091

Names of 1218315091

• Cardinal: 1218315091 can be written as One billion, two hundred eighteen million, three hundred fifteen thousand and ninety-one.

Scientific notation

• Scientific notation: 1.218315091 × 10⁹

Factors of 1218315091

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 26961

Divisors of 1218315091

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 10723 16231 75061 113617 174045013 1218315091
• Sum of all divisors σ(n): 1392575744
• Sum of proper divisors (its aliquot sum) s(n): 174260653
• 1218315091 is a deficient number, because the sum of its proper divisors (174260653) is less than itself. Its deficiency is 1044054438

Bases of 1218315091

• Binary: 1001000100111100000001101010011₂
• Hexadecimal: 0x489E0353
• Base-36: K5CPXV

Squares and roots of 1218315091

• 1218315091 squared (1218315091²) is 1484291660958338281
• 1218315091 cubed (1218315091³) is 1808334929990999050025298571
• The square root of 1218315091 is 34904.3706575551
• The cube root of 1218315091 is 1068.0375976863

Scales and comparisons

• 1,218,315,091 seconds is equal to 38 years, 38 weeks, 2 days, 20 hours, 51 minutes, 31 seconds.
• To count from 1 to 1,218,315,091 would take you about seventy-seven 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 1218315091 cubic inches would be around 89 feet tall.

Recreational maths with 1218315091

• 1218315091 backwards is 1905138121
• The number of decimal digits it has is: 10
• The sum of 1218315091's digits is 31
• More coming soon!