128865139728

Names of 128865139728

• Cardinal: 128865139728 can be written as One hundred twenty-eight billion, eight hundred sixty-five million, one hundred thirty-nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.28865139728 × 10¹¹

Factors of 128865139728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 666

Divisors of 128865139728

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 39 48 52 71 78 104 142 156 208 213 284 312 426 568 577 624 852 923 1136 1154 1704 1731 1846 2308 2769 3408 3462 3692 4616 5041 5538 6924 7384 7501 9232 10082 11076 13848 14768 15002 15123 20164 22152 22503 27696 30004 30246 40328 40967 44304 45006 60008 60492 65533 80656 81934 90012 120016 120984 122901 131066 163868 180024 196599 241968 245802 262132 327736 357911 360048 393198 491604 524264 532571 655472 715822 786396 983208 1048528 1065142 1073733 1431644 1572792 1597713 1966416 2130284 2147466 2863288 2908657 3145584 3195426 4260568 4294932 4652843 5726576 5817314 6390852 8521136 8589864 8725971 9305686 11634628 12781704 13958529 17179728 17451942 18611372 23269256 25563408 27917058 34903884 37222744 37812541 46538512 55834116 69807768 74445488 75625082 111668232 113437623 139615536 151250164 206514647 223336464 226875246 302500328 413029294 453750492 605000656 619543941 826058588 907500984 1239087882 1652117176 1815001968 2478175764 2684690411 3304234352 4956351528 5369380822 8054071233 9912703056 10738761644 16108142466 21477523288 32216284932 42955046576 64432569864 128865139728
• Sum of all divisors σ(n): 364261185792
• Sum of proper divisors (its aliquot sum) s(n): 235396046064
• 128865139728 is an abundant number, because the sum of its proper divisors (235396046064) is greater than itself. Its abundance is 106530906336

Bases of 128865139728

• Binary: 1111000000000111101011111110000010000₂
• Hexadecimal: 0x1E00F5FC10
• Base-36: 1N76Z66O

Squares and roots of 128865139728

• 128865139728 squared (128865139728²) is 16606224237116963913984
• 128865139728 cubed (128865139728³) is 2139963406670577758654681933156352
• The square root of 128865139728 is 358977.9098050465
• The cube root of 128865139728 is 5051.0129618883

Scales and comparisons

• 128,865,139,728 seconds is equal to 4,097 years, 26 weeks, 4 days, 16 hours, 8 minutes, 48 seconds.
• To count from 1 to 128,865,139,728 would take you about eight thousand, one hundred ninety-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 128865139728 cubic inches would be around 420.9 feet tall.

Recreational maths with 128865139728

• 128865139728 backwards is 827931568821
• The number of decimal digits it has is: 12
• The sum of 128865139728's digits is 60
• More coming soon!