128817744720

Names of 128817744720

• Cardinal: 128817744720 can be written as One hundred twenty-eight billion, eight hundred seventeen million, seven hundred forty-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.2881774472 × 10¹¹

Factors of 128817744720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1214

Divisors of 128817744720

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 31 35 40 42 48 56 60 62 70 73 80 84 93 105 112 120 124 140 146 155 168 186 210 217 219 240 248 280 292 310 336 365 372 420 434 438 465 496 511 560 584 620 651 730 744 840 868 876 930 961 1022 1085 1093 1095 1168 1240 1302 1460 1488 1533 1680 1736 1752 1860 1922 2044 2170 2186 2190 2263 2480 2555 2604 2883 2920 3066 3255 3279 3472 3504 3720 3844 4088 4340 4372 4380 4526 4805 5110 5208 5465 5766 5840 6132 6510 6558 6727 6789 7440 7651 7665 7688 8176 8680 8744 8760 9052 9610 10220 10416 10930 11315 11532 12264 13020 13116 13454 13578 14415 15302 15330 15376 15841 16395 17360 17488 17520 18104 19220 20181 20440 21860 22630 22953 23064 24528 26040 26232 26908 27156 28830 30604 30660 31682 32790 33635 33883 33945 36208 38255 38440 40362 40880 43720 45260 45906 46128 47523 52080 52464 53816 54312 57660 61208 61320 63364 65580 67270 67766 67890 70153 76510 76880 79205 79789 80724 87440 90520 91812 95046 100905 101649 107632 108624 114765 115320 122416 122640 126728 131160 134540 135532 135780 140306 153020 158410 159578 161448 169415 181040 183624 190092 201810 203298 210459 229530 230640 237181 237615 239367 253456 262320 269080 271064 271560 280612 306040 316820 319156 322896 338830 350765 367248 380184 398945 403620 406596 420918 459060 474362 475230 478734 491071 508245 538160 542128 543120 558523 561224 612080 633640 638312 677660 701530 711543 760368 797890 807240 813192 841836 918120 948724 950460 957468 982142 1016490 1050373 1052295 1117046 1122448 1185905 1196835 1267280 1276624 1355320 1403060 1423086 1473213 1595780 1614480 1626384 1675569 1683672 1836240 1897448 1900920 1914936 1964284 2032980 2100746 2104590 2234092 2371810 2393670 2455355 2473459 2710640 2792615 2806120 2846172 2946426 3151119 3191560 3351138 3367344 3557715 3794896 3801840 3829872 3928568 4065960 4201492 4209180 4468184 4743620 4787340 4910710 4946918 5251865 5585230 5612240 5692344 5892852 6302238 6383120 6702276 7115430 7352611 7366065 7420377 7857136 8131920 8377845 8402984 8418360 8936368 9487240 9574680 9821420 9893836 10503730 11170460 11384688 11785704 12367295 12604476 13404552 14230860 14705222 14732130 14840754 15755595 16755690 16805968 16836720 17314213 18974480 19149360 19642840 19787672 21007460 22057833 22340920 23571408 24734590 25208952 26809104 28461720 29410444 29464260 29681508 31511190 33511380 34628426 36763055 37101885 39285680 39575344 42014920 44115666 44681840 49469180 50417904 51942639 56923440 58820888 58928520 59363016 63022380 67022760 69256852 73526110 74203770 76677229 84029840 86571065 88231332 98938360 103885278 110289165 117641776 117857040 118726032 126044760 134045520 138513704 147052220 148407540 153354458 173142130 176462664 197876720 207770556 220578330 230031687 252089520 259713195 277027408 294104440 296815080 306708916 346284260 352925328 383386145 415541112 441156660 460063374 519426390 536740603 588208880 593630160 613417832 692568520 766772290 831082224 882313320 920126748 1038852780 1073481206 1150158435 1226835664 1385137040 1533544580 1610221809 1764626640 1840253496 2077705560 2146962412 2300316870 2683703015 3067089160 3220443618 3680506992 4155411120 4293924824 4600633740 5367406030 6134178320 6440887236 8051109045 8587849648 9201267480 10734812060 12881774472 16102218090 18402534960 21469624120 25763548944 32204436180 42939248240 64408872360 128817744720
• Sum of all divisors σ(n): 478477161216
• Sum of proper divisors (its aliquot sum) s(n): 349659416496
• 128817744720 is an abundant number, because the sum of its proper divisors (349659416496) is greater than itself. Its abundance is 220841671776

Bases of 128817744720

• Binary: 1110111111110001000101100101101010000₂
• Hexadecimal: 0x1DFE22CB50
• Base-36: 1N6ERBYO

Squares and roots of 128817744720

• 128817744720 squared (128817744720²) is 16594011354747087878400
• 128817744720 cubed (128817744720³) is 2137603118576591726483137602048000
• The square root of 128817744720 is 358911.8899117163
• The cube root of 128817744720 is 5050.3936525473

Scales and comparisons

• 128,817,744,720 seconds is equal to 4,096 years, 2 days, 2 hours, 52 minutes.
• To count from 1 to 128,817,744,720 would take you about eight thousand, one 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 128817744720 cubic inches would be around 420.9 feet tall.

Recreational maths with 128817744720

• 128817744720 backwards is 027447718821
• The number of decimal digits it has is: 12
• The sum of 128817744720's digits is 51
• More coming soon!