128817393390

Names of 128817393390

• Cardinal: 128817393390 can be written as One hundred twenty-eight billion, eight hundred seventeen million, three hundred ninety-three thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.2881739339 × 10¹¹

Factors of 128817393390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 398617

Divisors of 128817393390

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 19 21 27 30 35 38 42 45 54 57 63 70 81 90 95 105 114 126 133 135 162 171 189 190 210 243 266 270 285 315 342 378 399 405 486 513 567 570 630 665 798 810 855 945 1026 1134 1197 1215 1330 1539 1701 1710 1890 1995 2394 2430 2565 2835 3078 3402 3591 3990 4617 5130 5670 5985 7182 7695 8505 9234 10773 11970 15390 17010 17955 21546 23085 32319 35910 46170 53865 64638 107730 161595 323190 398581 797162 1195743 1992905 2391486 2790067 3587229 3985810 5580134 5978715 7174458 7573039 8370201 10761687 11957430 13950335 15146078 16740402 17936145 21523374 22719117 25110603 27900670 32285061 35872290 37865195 41851005 45438234 50221206 53011273 53808435 64570122 68157351 75331809 75730390 83702010 96855183 106022546 107616870 113595585 125553015 136314702 150663618 159033819 161425305 193710366 204472053 225995427 227191170 251106030 265056365 318067638 322850610 340786755 376659045 408944106 451990854 477101457 484275915 530112730 613416159 677986281 681573510 753318090 795169095 954202914 968551830 1022360265 1129977135 1226832318 1355972562 1431304371 1590338190 1840248477 2044720530 2259954270 2385507285 2862608742 3067080795 3389931405 3680496954 4293913113 4771014570 6134161590 6779862810 7156521855 8587826226 9201242385 12881739339 14313043710 18402484770 21469565565 25763478678 42939131130 64408696695 128817393390
• Sum of all divisors σ(n): 417841482240
• Sum of proper divisors (its aliquot sum) s(n): 289024088850
• 128817393390 is an abundant number, because the sum of its proper divisors (289024088850) is greater than itself. Its abundance is 160206695460

Bases of 128817393390

• Binary: 1110111111110000111010110111011101110₂
• Hexadecimal: 0x1DFE1D6EEE
• Base-36: 1N6EJSVI

Squares and roots of 128817393390

• 128817393390 squared (128817393390²) is 16593920839794015692100
• 128817393390 cubed (128817393390³) is 2137585628702264885977078815219000
• The square root of 128817393390 is 358911.4004737103
• The cube root of 128817393390 is 5050.3890611601

Scales and comparisons

• 128,817,393,390 seconds is equal to 4,095 years, 51 weeks, 5 days, 1 hour, 16 minutes, 30 seconds.
• To count from 1 to 128,817,393,390 would take you about eight thousand, one hundred ninety-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 128817393390 cubic inches would be around 420.9 feet tall.

Recreational maths with 128817393390

• 128817393390 backwards is 093393718821
• 128817393390 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128817393390's digits is 54
• More coming soon!