128138396715

Names of 128138396715

• Cardinal: 128138396715 can be written as One hundred twenty-eight billion, one hundred thirty-eight million, three hundred ninety-six thousand, seven hundred fifteen.

Scientific notation

• Scientific notation: 1.28138396715 × 10¹¹

Factors of 128138396715

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 98

Divisors of 128138396715

• Number of divisors d(n): 156
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 63 81 83 105 135 189 243 249 315 405 415 567 581 729 747 945 1215 1245 1701 1743 2187 2241 2835 2905 3645 3735 5103 5229 6561 6723 6889 8505 8715 10935 11205 15309 15687 19683 20169 20667 25515 26145 32805 33615 34445 45927 47061 48223 59049 60507 62001 76545 78435 98415 100845 103335 137781 141183 144669 177147 181521 186003 229635 235305 241115 295245 302535 310005 413343 423549 434007 531441 544563 558009 688905 705915 723345 885735 907605 930015 1240029 1270647 1302021 1633689 1674027 2066715 2117745 2170035 2657205 2722815 2790045 3720087 3811941 3906063 4901067 5022081 6200145 6353235 6510105 8168445 8370135 11435823 11718189 14703201 15066243 18600435 19059705 19530315 24505335 25110405 34307469 35154567 44109603 45198729 57179115 58590945 73516005 75331215 102922407 105463701 135596187 171537345 175772835 220548015 225993645 308767221 316391103 406788561 514612035 527318505 677980935 949173309 1220365683 1543836105 1581955515 2033942805 2847519927 3661097049 4745866545 6101828415 8542559781 14237599635 18305485245 25627679343 42712798905 128138396715
• Sum of all divisors σ(n): 266812975344
• Sum of proper divisors (its aliquot sum) s(n): 138674578629
• 128138396715 is an abundant number, because the sum of its proper divisors (138674578629) is greater than itself. Its abundance is 10536181914

Bases of 128138396715

• Binary: 1110111010101101001001100010000101011₂
• Hexadecimal: 0x1DD5A4C42B
• Base-36: 1MV6AJOR

Squares and roots of 128138396715

• 128138396715 squared (128138396715²) is 16419448712690722791225
• 128138396715 cubed (128138396715³) is 2103961832988359892122081170825875
• The square root of 128138396715 is 357964.2394360085
• The cube root of 128138396715 is 5041.4998884149

Scales and comparisons

• 128,138,396,715 seconds is equal to 4,074 years, 21 weeks, 7 hours, 5 minutes, 15 seconds.
• To count from 1 to 128,138,396,715 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 128138396715 cubic inches would be around 420.1 feet tall.

Recreational maths with 128138396715

• 128138396715 backwards is 517693831821
• The number of decimal digits it has is: 12
• The sum of 128138396715's digits is 54
• More coming soon!