7987890625

Names of 7987890625

• Cardinal: 7987890625 can be written as Seven billion, nine hundred eighty-seven million, eight hundred ninety thousand, six hundred twenty-five.

Scientific notation

• Scientific notation: 7.987890625 × 10⁹

Factors of 7987890625

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 29

Divisors of 7987890625

• Number of divisors d(n): 81
• Complete list of divisors:
  1 5 11 13 25 55 65 121 125 143 169 275 325 605 625 715 845 1375 1573 1625 1859 3025 3125 3575 4225 6875 7865 8125 9295 15125 15625 17875 20449 21125 34375 39325 40625 46475 75625 78125 89375 102245 105625 171875 196625 203125 232375 378125 390625 446875 511225 528125 859375 983125 1015625 1161875 1890625 2234375 2556125 2640625 4296875 4915625 5078125 5809375 9453125 11171875 12780625 13203125 24578125 29046875 47265625 55859375 63903125 66015625 122890625 145234375 319515625 614453125 726171875 1597578125 7987890625
• Sum of all divisors σ(n): 11884271259
• Sum of proper divisors (its aliquot sum) s(n): 3896380634
• 7987890625 is a deficient number, because the sum of its proper divisors (3896380634) is less than itself. Its deficiency is 4091509991

Bases of 7987890625

• Binary: 111011100000111011000100111000001₂
• Hexadecimal: 0x1DC1D89C1
• Base-36: 3O3S7UP

Squares and roots of 7987890625

• 7987890625 squared (7987890625²) is 63806396636962890625
• 7987890625 cubed (7987890625³) is 509678517511427402496337890625
• 7987890625 is a perfect square number. Its square root is 89375
• The cube root of 7987890625 is 1998.9903758317

Scales and comparisons

• 7,987,890,625 seconds is equal to 253 years, 51 weeks, 3 days, 10 hours, 30 minutes, 25 seconds.
• To count from 1 to 7,987,890,625 would take you about five hundred 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 7987890625 cubic inches would be around 166.6 feet tall.

Recreational maths with 7987890625

• 7987890625 backwards is 5260987897
• The number of decimal digits it has is: 10
• The sum of 7987890625's digits is 61
• More coming soon!