398942137989

Names of 398942137989

• Cardinal: 398942137989 can be written as Three hundred ninety-eight billion, nine hundred forty-two million, one hundred thirty-seven thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 3.98942137989 × 10¹¹

Factors of 398942137989

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 460959

Divisors of 398942137989

• Number of divisors d(n): 48
• Complete list of divisors:
  1 3 9 19 57 61 83 171 183 249 549 747 1159 1577 3477 4731 5063 10431 14193 15189 45567 96197 288591 460793 865773 1382379 4147137 8755067 26265201 28108373 38245819 78795603 84325119 114737457 252975357 344212371 534059087 726670561 1602177261 2180011683 2332994959 4806531783 6540035049 6998984877 20996954631 44326904221 132980712663 398942137989
• Sum of all divisors σ(n): 623951939520
• Sum of proper divisors (its aliquot sum) s(n): 225009801531
• 398942137989 is a deficient number, because the sum of its proper divisors (225009801531) is less than itself. Its deficiency is 173932336458

Bases of 398942137989

• Binary: 101110011100010110011011110111010000101₂
• Hexadecimal: 0x5CE2CDEE85
• Base-36: 539RUJR9

Squares and roots of 398942137989

• 398942137989 squared (398942137989²) is 159154829463234316964121
• 398942137989 cubed (398942137989³) is 63493567937337387680540523544092669
• The square root of 398942137989 is 631618.6650099883
• The cube root of 398942137989 is 7361.5619346025

Scales and comparisons

• 398,942,137,989 seconds is equal to 12,685 years, 6 weeks, 3 days, 20 hours, 33 minutes, 9 seconds.
• To count from 1 to 398,942,137,989 would take you about twenty-five thousand, three 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 398942137989 cubic inches would be around 613.5 feet tall.

Recreational maths with 398942137989

• 398942137989 backwards is 989731249893
• The number of decimal digits it has is: 12
• The sum of 398942137989's digits is 72
• More coming soon!