8990728161

Names of 8990728161

• Cardinal: 8990728161 can be written as Eight billion, nine hundred ninety million, seven hundred twenty-eight thousand, one hundred sixty-one.

Scientific notation

• Scientific notation: 8.990728161 × 10⁹

Factors of 8990728161

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 225

Divisors of 8990728161

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 19 29 37 57 87 111 137 411 551 703 841 1073 1369 1653 2109 2523 2603 3219 3973 4107 5069 7809 11919 15207 15979 20387 26011 31117 39701 47937 61161 75487 78033 93351 96311 115217 119103 147001 187553 226461 288933 345651 441003 562659 591223 754319 1151329 1773669 2189123 2262957 2793019 3453987 3563507 4263029 5439037 6567369 8379057 10690521 12789087 16317111 21875251 65625753 80997551 103341703 157732073 242992653 310025109 473196219 2996909387 8990728161
• Sum of all divisors σ(n): 13529486880
• Sum of proper divisors (its aliquot sum) s(n): 4538758719
• 8990728161 is a deficient number, because the sum of its proper divisors (4538758719) is less than itself. Its deficiency is 4451969442

Bases of 8990728161

• Binary: 1000010111111000111001111111100001₂
• Hexadecimal: 0x217E39FE1
• Base-36: 44OUI8X

Squares and roots of 8990728161

• 8990728161 squared (8990728161²) is 80833192864998441921
• 8990728161 cubed (8990728161³) is 726749263434885763000257637281
• The square root of 8990728161 is 94819.4503306155
• The cube root of 8990728161 is 2079.3692738291

Scales and comparisons

• 8,990,728,161 seconds is equal to 285 years, 45 weeks, 4 days, 8 hours, 29 minutes, 21 seconds.
• To count from 1 to 8,990,728,161 would take you about five hundred seventy-one 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 8990728161 cubic inches would be around 173.3 feet tall.

Recreational maths with 8990728161

• 8990728161 backwards is 1618270998
• The number of decimal digits it has is: 10
• The sum of 8990728161's digits is 51
• More coming soon!