128395579221

Names of 128395579221

• Cardinal: 128395579221 can be written as One hundred twenty-eight billion, three hundred ninety-five million, five hundred seventy-nine thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 1.28395579221 × 10¹¹

Factors of 128395579221

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 4998

Divisors of 128395579221

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 9 13 21 27 39 61 63 91 117 181 183 189 273 351 427 543 549 793 819 1267 1281 1629 1647 2353 2379 2457 3801 3843 4733 4887 5551 7059 7137 11041 11403 11529 14199 16471 16653 21177 21411 33123 33131 34209 42597 49413 49959 61529 63531 77287 99369 99393 127791 143533 148239 149877 184587 231861 288713 298107 298179 430599 430703 444717 553761 695583 856673 866139 894537 1004731 1291797 1292109 1661283 2020991 2086749 2570019 2598417 3014193 3753269 3875391 3876327 5996711 6062973 7710057 7795251 9042579 11136749 11259807 11628981 17990133 18188919 23130171 26272883 27127737 33410247 33779421 52257053 53970399 54566757 77957243 78818649 100230741 101338263 156771159 161911197 233871729 236455947 300692223 365799371 470313477 679341689 701615187 709367841 1097398113 1410940431 2038025067 2104845561 3292194339 4755391823 6114075201 9876583017 14266175469 18342225603 42798526407 128395579221
• Sum of all divisors σ(n): 239314682880
• Sum of proper divisors (its aliquot sum) s(n): 110919103659
• 128395579221 is a deficient number, because the sum of its proper divisors (110919103659) is less than itself. Its deficiency is 17476475562

Bases of 128395579221

• Binary: 1110111100100111110010000111101010101₂
• Hexadecimal: 0x1DE4F90F55
• Base-36: 1MZFEUZ9

Squares and roots of 128395579221

• 128395579221 squared (128395579221²) is 16485424763496086966841
• 128395579221 cubed (128395579221³) is 2116655661213297023074539215610861
• The square root of 128395579221 is 358323.2886947205
• The cube root of 128395579221 is 5044.8705124933

Scales and comparisons

• 128,395,579,221 seconds is equal to 4,082 years, 30 weeks, 1 day, 22 hours, 40 minutes, 21 seconds.
• To count from 1 to 128,395,579,221 would take you about eight thousand, one hundred sixty-five 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 128395579221 cubic inches would be around 420.4 feet tall.

Recreational maths with 128395579221

• 128395579221 backwards is 122975593821
• The number of decimal digits it has is: 12
• The sum of 128395579221's digits is 54
• More coming soon!