30991255988

Names of 30991255988

• Cardinal: 30991255988 can be written as Thirty billion, nine hundred ninety-one million, two hundred fifty-five thousand, nine hundred eighty-eight.

Scientific notation

• Scientific notation: 3.0991255988 × 10¹⁰

Factors of 30991255988

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1453

Divisors of 30991255988

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 7 11 14 22 28 44 49 77 98 154 196 308 343 539 686 1078 1372 1433 2156 2866 3773 5732 7546 10031 15092 15763 20062 31526 40124 63052 70217 110341 140434 220682 280868 441364 491519 772387 983038 1544774 1966076 2053489 3089548 4106978 5406709 8213956 10813418 14374423 21626836 22588379 28748846 45176758 57497692 90353516 100620961 158118653 201241922 316237306 402483844 632474612 704346727 1106830571 1408693454 2213661142 2817386908 4427322284 7747813997 15495627994 30991255988
• Sum of all divisors σ(n): 69045412800
• Sum of proper divisors (its aliquot sum) s(n): 38054156812
• 30991255988 is an abundant number, because the sum of its proper divisors (38054156812) is greater than itself. Its abundance is 7062900824

Bases of 30991255988

• Binary: 11100110111001110010000100110110100₂
• Hexadecimal: 0x7373909B4
• Base-36: E8JE65W

Squares and roots of 30991255988

• 30991255988 squared (30991255988²) is 960457947713745856144
• 30991255988 cubed (30991255988³) is 29765798123305817174132926590272
• The square root of 30991255988 is 176043.3355398607
• The cube root of 30991255988 is 3141.0852668739

Scales and comparisons

• 30,991,255,988 seconds is equal to 985 years, 22 weeks, 1 day, 2 hours, 13 minutes, 8 seconds.
• To count from 1 to 30,991,255,988 would take you about one thousand, nine hundred seventy 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 30991255988 cubic inches would be around 261.8 feet tall.

Recreational maths with 30991255988

• 30991255988 backwards is 88955219903
• The number of decimal digits it has is: 11
• The sum of 30991255988's digits is 59
• More coming soon!