399720708985

Names of 399720708985

• Cardinal: 399720708985 can be written as Three hundred ninety-nine billion, seven hundred twenty million, seven hundred eight thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 3.99720708985 × 10¹¹

Factors of 399720708985

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 427

Divisors of 399720708985

• Number of divisors d(n): 72
• Complete list of divisors:
  1 5 13 37 41 65 185 205 331 481 533 1369 1517 1655 2405 2665 4303 6845 7585 12247 13571 17797 19721 21515 56129 61235 67855 88985 98605 109561 159211 176423 280645 453139 502127 547805 729677 796055 882115 1424293 2265695 2510635 3648385 4053757 4492001 5890807 6527651 7121465 18578699 20268785 22460005 29454035 32638255 52698841 58396013 92893495 149989009 166204037 241523087 263494205 291980065 749945045 831020185 1207615435 1949857117 2160652481 6149549369 9749285585 10803262405 30747746845 79944141797 399720708985
• Sum of all divisors σ(n): 545497423128
• Sum of proper divisors (its aliquot sum) s(n): 145776714143
• 399720708985 is a deficient number, because the sum of its proper divisors (145776714143) is less than itself. Its deficiency is 253943994842

Bases of 399720708985

• Binary: 101110100010001001101011111101101111001₂
• Hexadecimal: 0x5D1135FB79
• Base-36: 53MNE0ZD

Squares and roots of 399720708985

• 399720708985 squared (399720708985²) is 159776645191471059730225
• 399720708985 cubed (399720708985³) is 63866033895179603070474819833571625
• The square root of 399720708985 is 632234.6945438853
• The cube root of 399720708985 is 7366.3477365105

Scales and comparisons

• 399,720,708,985 seconds is equal to 12,709 years, 45 weeks, 6 days, 2 hours, 16 minutes, 25 seconds.
• To count from 1 to 399,720,708,985 would take you about twenty-five thousand, four hundred nineteen 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 399720708985 cubic inches would be around 613.9 feet tall.

Recreational maths with 399720708985

• 399720708985 backwards is 589807027993
• The number of decimal digits it has is: 12
• The sum of 399720708985's digits is 67
• More coming soon!