399921345

Names of 399921345

• Cardinal: 399921345 can be written as Three hundred ninety-nine million, nine hundred twenty-one thousand, three hundred forty-five.

Scientific notation

• Scientific notation: 3.99921345 × 10⁸

Factors of 399921345

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 332

Divisors of 399921345

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 5 9 15 17 37 45 51 71 85 111 153 185 199 213 255 333 355 555 597 629 639 765 995 1065 1207 1665 1791 1887 2627 2985 3145 3195 3383 3621 5661 6035 7363 7881 8955 9435 10149 10863 13135 14129 16915 18105 22089 23643 28305 30447 36815 39405 42387 44659 50745 54315 66267 70645 110445 118215 125171 127161 133977 152235 211935 223295 240193 331335 375513 401931 522773 625855 635805 669885 720579 1126539 1200965 1568319 1877565 2009655 2161737 2613865 3602895 4704957 5632695 7841595 8887141 10808685 23524785 26661423 44435705 79984269 133307115 399921345
• Sum of all divisors σ(n): 768268800
• Sum of proper divisors (its aliquot sum) s(n): 368347455
• 399921345 is a deficient number, because the sum of its proper divisors (368347455) is less than itself. Its deficiency is 31573890

Bases of 399921345

• Binary: 10111110101100101000011000001₂
• Hexadecimal: 0x17D650C1
• Base-36: 6M3PA9

Squares and roots of 399921345

• 399921345 squared (399921345²) is 159937082186609025
• 399921345 cubed (399921345³) is 63962253023444222267138625
• The square root of 399921345 is 19998.0335283247
• The cube root of 399921345 is 736.7580019793

Scales and comparisons

• 399,921,345 seconds is equal to 12 years, 37 weeks, 1 day, 17 hours, 15 minutes, 45 seconds.
• To count from 1 to 399,921,345 would take you about 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 399921345 cubic inches would be around 61.4 feet tall.

Recreational maths with 399921345

• 399921345 backwards is 543129993
• 399921345 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 399921345's digits is 45
• More coming soon!