128689621788

Names of 128689621788

• Cardinal: 128689621788 can be written as One hundred twenty-eight billion, six hundred eighty-nine million, six hundred twenty-one thousand, seven hundred eighty-eight.

Scientific notation

• Scientific notation: 1.28689621788 × 10¹¹

Factors of 128689621788

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 134

Divisors of 128689621788

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 6 7 12 13 14 21 26 28 39 42 49 52 78 84 91 98 109 147 156 169 182 196 218 273 294 327 338 364 436 507 546 588 637 654 676 763 1014 1092 1183 1274 1308 1417 1526 1911 2028 2289 2366 2548 2834 3052 3549 3822 4251 4578 4732 5341 5668 7098 7644 8281 8502 9156 9919 10682 11881 14196 16023 16562 17004 18421 19838 21364 23762 24843 29757 32046 33124 35643 36842 39676 47524 49686 55263 59514 64092 69433 71286 73684 83167 99372 110526 119028 128947 138866 142572 154453 166334 208299 221052 249501 257894 277732 308906 332668 386841 416598 463359 499002 515788 582169 617812 773682 833196 902629 926718 998004 1081171 1164338 1295029 1547364 1746507 1805258 1853436 2007889 2162342 2328676 2590058 2707887 3243513 3493014 3610516 3885087 4015778 4324684 5180116 5415774 6023667 6487026 6986028 7568197 7770174 8031556 9065203 10831548 12047334 12974052 14055223 15136394 15540348 16835377 18130406 22704591 24094668 27195609 28110446 30272788 33670754 36260812 42165669 45409182 50506131 54391218 56220892 63456421 67341508 84331338 90818364 98386561 101012262 108782436 117847639 126912842 168662676 190369263 196773122 202024524 218859901 235695278 253825684 295159683 353542917 380738526 393546244 437719802 471390556 590319366 656579703 707085834 761477052 824933473 875439604 1180638732 1313159406 1414171668 1532019307 1649866946 2474800419 2626318812 3064038614 3299733892 4596057921 4949600838 6128077228 9192115842 9899201676 10724135149 18384231684 21448270298 32172405447 42896540596 64344810894 128689621788
• Sum of all divisors σ(n): 381738717360
• Sum of proper divisors (its aliquot sum) s(n): 253049095572
• 128689621788 is an abundant number, because the sum of its proper divisors (253049095572) is greater than itself. Its abundance is 124359473784

Bases of 128689621788

• Binary: 1110111110110011111111100101100011100₂
• Hexadecimal: 0x1DF67FCB1C
• Base-36: 1N4AH7OC

Squares and roots of 128689621788

• 128689621788 squared (128689621788²) is 16561018755938484316944
• 128689621788 cubed (128689621788³) is 2131231240125697825741492879975872
• The square root of 128689621788 is 358733.3575066585
• The cube root of 128689621788 is 5048.7187127849

Scales and comparisons

• 128,689,621,788 seconds is equal to 4,091 years, 48 weeks, 3 days, 5 hours, 9 minutes, 48 seconds.
• To count from 1 to 128,689,621,788 would take you about eight thousand, one hundred eighty-three 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 128689621788 cubic inches would be around 420.7 feet tall.

Recreational maths with 128689621788

• 128689621788 backwards is 887126986821
• The number of decimal digits it has is: 12
• The sum of 128689621788's digits is 66
• More coming soon!