189945990

Names of 189945990

• Cardinal: 189945990 can be written as One hundred eighty-nine million, nine hundred forty-five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.8994599 × 10⁸

Factors of 189945990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 5291

Divisors of 189945990

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 30 31 39 45 62 65 78 90 93 117 130 155 186 195 234 279 310 390 403 465 558 585 806 930 1170 1209 1395 2015 2418 2790 3627 4030 5237 6045 7254 10474 12090 15711 18135 26185 31422 36270 47133 52370 68081 78555 94266 136162 157110 162347 204243 235665 324694 340405 408486 471330 487041 612729 680810 811735 974082 1021215 1225458 1461123 1623470 2042430 2110511 2435205 2922246 3063645 4221022 4870410 6127290 6331533 7305615 10552555 12663066 14611230 18994599 21105110 31657665 37989198 63315330 94972995 189945990
• Sum of all divisors σ(n): 549110016
• Sum of proper divisors (its aliquot sum) s(n): 359164026
• 189945990 is an abundant number, because the sum of its proper divisors (359164026) is greater than itself. Its abundance is 169218036

Bases of 189945990

• Binary: 1011010100100101100010000110₂
• Hexadecimal: 0xB525886
• Base-36: 35379I

Squares and roots of 189945990

• 189945990 squared (189945990²) is 36079479117080100
• 189945990 cubed (189945990³) is 6853152379578105503799000
• The square root of 189945990 is 13782.0894642287
• The cube root of 189945990 is 574.8352294109

Scales and comparisons

• 189,945,990 seconds is equal to 6 years, 2 weeks, 10 hours, 46 minutes, 30 seconds.
• To count from 1 to 189,945,990 would take you about nine 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 189945990 cubic inches would be around 47.9 feet tall.

Recreational maths with 189945990

• 189945990 backwards is 099549981
• The number of decimal digits it has is: 9
• The sum of 189945990's digits is 54
• More coming soon!