128668722

Names of 128668722

• Cardinal: 128668722 can be written as One hundred twenty-eight million, six hundred sixty-eight thousand, seven hundred twenty-two.

Scientific notation

• Scientific notation: 1.28668722 × 10⁸

Factors of 128668722

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 280

Divisors of 128668722

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 13 14 19 21 26 38 39 42 57 78 79 91 114 133 157 158 182 237 247 266 273 314 399 471 474 494 546 553 741 798 942 1027 1099 1106 1482 1501 1659 1729 2041 2054 2198 2983 3002 3081 3297 3318 3458 4082 4503 5187 5966 6123 6162 6594 7189 8949 9006 10374 10507 12246 12403 14287 14378 17898 19513 20881 21014 21567 24806 28574 31521 37209 38779 39026 41762 42861 43134 58539 62643 63042 74418 77558 85722 86821 116337 117078 125286 136591 161239 173642 232674 235657 260463 271453 273182 322478 409773 471314 483717 520926 542906 706971 814359 819546 967434 1128673 1413942 1628718 1649599 2257346 3063541 3299198 3386019 4948797 6127082 6772038 9190623 9897594 18381246 21444787 42889574 64334361 128668722
• Sum of all divisors σ(n): 339763200
• Sum of proper divisors (its aliquot sum) s(n): 211094478
• 128668722 is an abundant number, because the sum of its proper divisors (211094478) is greater than itself. Its abundance is 82425756

Bases of 128668722

• Binary: 111101010110101010000110010₂
• Hexadecimal: 0x7AB5432
• Base-36: 24LTF6

Squares and roots of 128668722

• 128668722 squared (128668722²) is 16555640021113284
• 128668722 cubed (128668722³) is 2130193043408699269503048
• The square root of 128668722 is 11343.2236158863
• The cube root of 128668722 is 504.8445386255

Scales and comparisons

• 128,668,722 seconds is equal to 4 years, 4 weeks, 5 days, 5 hours, 18 minutes, 42 seconds.
• To count from 1 to 128,668,722 would take you about six 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 128668722 cubic inches would be around 42.1 feet tall.

Recreational maths with 128668722

• 128668722 backwards is 227866821
• 128668722 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 128668722's digits is 42
• More coming soon!