399389168768

Names of 399389168768

• Cardinal: 399389168768 can be written as Three hundred ninety-nine billion, three hundred eighty-nine million, one hundred sixty-eight thousand, seven hundred sixty-eight.

Scientific notation

• Scientific notation: 3.99389168768 × 10¹¹

Factors of 399389168768

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 758

Divisors of 399389168768

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 8 16 32 64 83 128 166 332 664 673 1328 1346 2656 2692 5312 5384 6889 10624 10768 13778 21536 27556 43072 55112 55859 86144 110224 111718 220448 223436 440896 446872 452929 881792 893744 905858 1787488 1811716 3574976 3623432 4636297 7149952 7246864 9272594 14493728 18545188 28987456 37090376 37593107 57974912 74180752 75186214 148361504 150372428 296723008 300744856 593446016 601489712 1202979424 2405958848 3120227881 4811917696 6240455762 12480911524 24961823048 49923646096 99847292192 199694584384 399389168768
• Sum of all divisors σ(n): 806558298345
• Sum of proper divisors (its aliquot sum) s(n): 407169129577
• 399389168768 is an abundant number, because the sum of its proper divisors (407169129577) is greater than itself. Its abundance is 7779960809

Bases of 399389168768

• Binary: 101110011111101011100110001010010000000₂
• Hexadecimal: 0x5CFD731480
• Base-36: 53H5ZYWW

Squares and roots of 399389168768

• 399389168768 squared (399389168768²) is 159511708129193986637824
• 399389168768 cubed (399389168768³) is 63707248518482614677104626428280832
• The square root of 399389168768 is 631972.4430447897
• The cube root of 399389168768 is 7364.3105507073

Scales and comparisons

• 399,389,168,768 seconds is equal to 12,699 years, 17 weeks, 4 days, 19 hours, 46 minutes, 8 seconds.
• To count from 1 to 399,389,168,768 would take you about twenty-five thousand, three hundred ninety-eight 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 399389168768 cubic inches would be around 613.7 feet tall.

Recreational maths with 399389168768

• 399389168768 backwards is 867861983993
• The number of decimal digits it has is: 12
• The sum of 399389168768's digits is 77
• More coming soon!