128721865978224

Names of 128721865978224

• Cardinal: 128721865978224 can be written as One hundred twenty-eight trillion, seven hundred twenty-one billion, eight hundred sixty-five million, nine hundred seventy-eight thousand, two hundred twenty-four.

Scientific notation

• Scientific notation: 1.28721865978224 × 10¹⁴

Factors of 128721865978224

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4394

Divisors of 128721865978224

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 36 48 54 67 72 108 134 144 201 216 268 271 402 432 536 542 603 804 813 1072 1084 1206 1608 1626 1809 2168 2412 2439 3216 3252 3618 4051 4336 4824 4878 6504 7236 7317 8102 9648 9756 12153 13008 14472 14634 16204 18157 19512 24306 28944 29268 32408 36314 36459 39024 48612 54471 58536 64816 72628 72918 97224 108942 109377 117072 145256 145836 163413 194448 217884 218754 271417 290512 291672 326826 435768 437508 490239 542834 583344 653652 814251 871536 875016 980478 1085668 1097821 1307304 1628502 1750032 1960956 2171336 2195642 2442753 2614608 3257004 3293463 3921912 4342672 4391284 4885506 6514008 6586926 7328259 7843824 8782568 9771012 9880389 13028016 13173852 14656518 16410601 17565136 19542024 19760778 26347704 29313036 29641167 32821202 39084048 39521556 49231803 52695408 58626072 59282334 65642404 73554007 79043112 98463606 117252144 118564668 131284808 147108014 147695409 158086224 196927212 220662021 237129336 262569616 294216028 295390818 393854424 441324042 443086227 474258672 588432056 590781636 661986063 787708848 882648084 886172454 1099510267 1176864112 1181563272 1323972126 1765296168 1772344908 1985958189 2199020534 2363126544 2647944252 3298530801 3530592336 3544689816 3971916378 4398041068 4447272871 5295888504 6597061602 7089379632 7943832756 8796082136 8894545742 9895592403 10591777008 13194123204 13341818613 15887665512 17592164272 17789091484 19791184806 26388246408 26683637226 29686777209 31775331024 35578182968 39582369612 40025455839 52776492816 53367274452 59373554418 71156365936 79164739224 80050911678 106734548904 118747108836 120076367517 158329478448 160101823356 213469097808 237494217672 240152735034 297967282357 320203646712 474988435344 480305470068 595934564714 640407293424 893901847071 960610940136 1191869129428 1787803694142 1921221880272 2383738258856 2681705541213 3575607388284 4767476517712 5363411082426 7151214776568 8045116623639 10726822164852 14302429553136 16090233247278 21453644329704 32180466494556 42907288659408 64360932989112 128721865978224
• Sum of all divisors σ(n): 376470723141120
• Sum of proper divisors (its aliquot sum) s(n): 247748857162896
• 128721865978224 is an abundant number, because the sum of its proper divisors (247748857162896) is greater than itself. Its abundance is 119026991184672

Bases of 128721865978224

• Binary: 11101010001001001100101000110001011000101110000₂
• Hexadecimal: 0x75126518B170
• Base-36: 19MM0BI4C0

Squares and roots of 128721865978224

• 128721865978224 squared (128721865978224²) is 16569318780915861292442194176
• 128721865978224 cubed (128721865978224³) is 2132833631467521368787107135964831195623424
• The square root of 128721865978224 is 11345565.9170542919
• The cube root of 128721865978224 is 50491.4034287947

Scales and comparisons

• 128,721,865,978,224 seconds is equal to 4,092,957 years, 9 weeks, 18 hours, 50 minutes, 24 seconds.
• To count from 1 to 128,721,865,978,224 would take you about ten million, two hundred thirty-two thousand, three hundred ninety-two 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 128721865978224 cubic inches would be around 4207.6 feet tall.

Recreational maths with 128721865978224

• 128721865978224 backwards is 422879568127821
• 128721865978224 is a Harshad number.
• The number of decimal digits it has is: 15
• The sum of 128721865978224's digits is 72
• More coming soon!