3998978929845

Names of 3998978929845

• Cardinal: 3998978929845 can be written as Three trillion, nine hundred ninety-eight billion, nine hundred seventy-eight million, nine hundred twenty-nine thousand, eight hundred forty-five.

Scientific notation

• Scientific notation: 3.998978929845 × 10¹²

Factors of 3998978929845

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 57742846

Divisors of 3998978929845

• Number of divisors d(n): 56
• Complete list of divisors:
  1 3 5 9 15 19 27 45 57 81 95 135 171 243 285 405 513 729 855 1215 1539 2565 3645 4617 7695 13851 23085 69255 57742819 173228457 288714095 519685371 866142285 1097113561 1559056113 2598426855 3291340683 4677168339 5485567805 7795280565 9874022049 14031505017 16456703415 23385841695 29622066147 42094515051 49370110245 70157525085 88866198441 148110330735 210472575255 266598595323 444330992205 799795785969 1332992976615 3998978929845
• Sum of all divisors σ(n): 7573548271200
• Sum of proper divisors (its aliquot sum) s(n): 3574569341355
• 3998978929845 is a deficient number, because the sum of its proper divisors (3574569341355) is less than itself. Its deficiency is 424409588490

Bases of 3998978929845

• Binary: 111010001100010101101101111111010010110101₂
• Hexadecimal: 0x3A315B7F4B5
• Base-36: 1F13SSYB9

Squares and roots of 3998978929845

• 3998978929845 squared (3998978929845²) is 15991832481344261431724025
• 3998978929845 cubed (3998978929845³) is 63951001142506585507267649027876026125
• The square root of 3998978929845 is 1999744.7161687913
• The cube root of 3998978929845 is 15872.6596982033

Scales and comparisons

• 3,998,978,929,845 seconds is equal to 127,155 years, 8 weeks, 2 days, 8 hours, 30 minutes, 45 seconds.
• To count from 1 to 3,998,978,929,845 would take you about three hundred seventeen thousand, eight hundred eighty-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 3998978929845 cubic inches would be around 1322.7 feet tall.

Recreational maths with 3998978929845

• 3998978929845 backwards is 5489298798993
• The number of decimal digits it has is: 13
• The sum of 3998978929845's digits is 90
• More coming soon!