128128231728

Names of 128128231728

• Cardinal: 128128231728 can be written as One hundred twenty-eight billion, one hundred twenty-eight million, two hundred thirty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.28128231728 × 10¹¹

Factors of 128128231728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 2533

Divisors of 128128231728

• Number of divisors d(n): 280
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 36 42 48 49 54 56 63 72 84 98 108 112 126 144 147 168 189 196 216 252 294 336 343 378 392 432 441 504 588 686 756 784 882 1008 1029 1176 1323 1372 1512 1764 2058 2352 2401 2521 2646 2744 3024 3087 3528 4116 4802 5042 5292 5488 6174 7056 7203 7563 8232 9261 9604 10084 10584 12348 14406 15126 16464 16807 17647 18522 19208 20168 21168 21609 22689 24696 28812 30252 33614 35294 37044 38416 40336 43218 45378 49392 50421 52941 57624 60504 64827 67228 68067 70588 74088 86436 90756 100842 105882 115248 117649 121008 123529 129654 134456 136134 141176 148176 151263 158823 172872 181512 201684 211764 235298 247058 259308 268912 272268 282352 302526 317646 345744 352947 363024 370587 403368 423528 453789 470596 476469 494116 518616 544536 605052 635292 705894 741174 806736 847056 864703 907578 941192 952938 988232 1037232 1058841 1089072 1111761 1210104 1270584 1411788 1482348 1729406 1815156 1882384 1905876 1976464 2117682 2223522 2420208 2541168 2594109 2823576 2964696 3176523 3335283 3458812 3630312 3811752 4235364 4447044 5188218 5647152 5929392 6052921 6353046 6670566 6917624 7260624 7623504 7782327 8470728 8894088 10376436 12105842 12706092 13341132 13835248 15564654 16941456 17788176 18158763 20752872 23346981 24211684 25412184 26682264 31129308 36317526 41505744 42370447 46693962 48423368 50824368 53364528 54476289 62258616 72635052 84740894 93387924 96846736 108952578 124517232 127111341 145270104 163428867 169481788 186775848 217905156 254222682 290540208 296593129 326857734 338963576 373551696 381334023 435810312 508445364 593186258 653715468 677927152 762668046 871620624 889779387 1016890728 1144002069 1186372516 1307430936 1525336092 1779558774 2033781456 2288004138 2372745032 2614861872 2669338161 3050672184 3559117548 4576008276 4745490064 5338676322 6101344368 7118235096 8008014483 9152016552 10677352644 14236470192 16016028966 18304033104 21354705288 32032057932 42709410576 64064115864 128128231728
• Sum of all divisors σ(n): 429241070960
• Sum of proper divisors (its aliquot sum) s(n): 301112839232
• 128128231728 is an abundant number, because the sum of its proper divisors (301112839232) is greater than itself. Its abundance is 172984607504

Bases of 128128231728

• Binary: 1110111010101000010011010100100110000₂
• Hexadecimal: 0x1DD509A930
• Base-36: 1MV08OC0

Squares and roots of 128128231728

• 128128231728 squared (128128231728²) is 16416843765744065865984
• 128128231728 cubed (128128231728³) is 2103461162259627819617692944740352
• The square root of 128128231728 is 357950.0408269289
• The cube root of 128128231728 is 5041.3665738705

Scales and comparisons

• 128,128,231,728 seconds is equal to 4,074 years, 4 weeks, 1 day, 15 hours, 28 minutes, 48 seconds.
• To count from 1 to 128,128,231,728 would take you about eight thousand, one hundred forty-eight 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 128128231728 cubic inches would be around 420.1 feet tall.

Recreational maths with 128128231728

• 128128231728 backwards is 827132821821
• The number of decimal digits it has is: 12
• The sum of 128128231728's digits is 45
• More coming soon!