128901249720

Names of 128901249720

• Cardinal: 128901249720 can be written as One hundred twenty-eight billion, nine hundred one million, two hundred forty-nine thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.2890124972 × 10¹¹

Factors of 128901249720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2830

Divisors of 128901249720

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 29 30 36 37 40 41 45 54 58 60 72 74 82 87 90 108 111 116 120 123 135 145 148 164 174 180 185 205 216 222 232 246 261 270 290 296 328 333 348 360 369 370 410 435 444 492 522 540 555 580 615 666 696 738 740 783 820 870 888 984 999 1044 1073 1080 1107 1110 1160 1189 1230 1305 1332 1476 1480 1517 1566 1640 1665 1740 1845 1998 2088 2146 2214 2220 2378 2460 2610 2664 2713 2952 3034 3132 3219 3330 3480 3567 3690 3915 3996 4292 4428 4440 4551 4756 4920 4995 5220 5365 5426 5535 5945 6068 6264 6438 6660 7134 7380 7585 7830 7992 8139 8584 8856 9102 9512 9657 9990 10440 10701 10730 10852 11070 11890 12136 12876 13320 13565 13653 14268 14760 15170 15660 16095 16278 17835 18204 19314 19980 21402 21460 21704 22140 22755 23780 24417 25752 27130 27306 28536 28971 30340 31320 32103 32190 32556 35670 36408 38628 39960 40695 40959 42804 42920 43993 44280 45510 47560 48285 48834 53505 54260 54612 57942 60680 64206 64380 65112 68265 71340 73251 77256 78677 81390 81918 85608 87986 91020 96570 97668 100381 107010 108520 109224 111233 115884 122085 128412 128760 131979 136530 142680 144855 146502 157354 160515 162780 163836 175972 182040 193140 195336 200762 204795 214020 219965 222466 231768 236031 244170 256824 263958 273060 289710 293004 301143 314708 321030 325560 327672 333699 351944 366255 386280 393385 395937 401524 409590 428040 439930 444932 472062 488340 501905 527916 546120 556165 579420 586008 602286 629416 642060 659895 667398 708093 732510 786770 791874 803048 819180 879860 889864 903429 944124 976680 1001097 1003810 1055832 1112330 1158840 1180155 1187811 1204572 1284120 1319790 1334796 1416186 1465020 1505715 1573540 1583748 1638360 1668495 1759720 1806858 1888248 1979685 2002194 2007620 2124279 2224660 2360310 2375622 2409144 2639580 2669592 2710287 2832372 2911049 2930040 3003291 3011430 3147080 3167496 3225757 3336990 3540465 3613716 3959370 4004388 4015240 4115621 4248558 4449320 4517145 4720620 4751244 5005485 5279160 5420574 5664744 5822098 5939055 6006582 6022860 6451514 6673980 7080930 7227432 7918740 8008776 8231242 8497116 8733147 9034290 9441240 9502488 9677271 10010970 10621395 10841148 11644196 11878110 12013164 12045720 12346863 12903028 13347960 13551435 14161860 14555245 15016455 15837480 16128785 16462484 16994232 17466294 18068580 19354542 20021940 20578105 21242790 21682296 23288392 23756220 24026328 24693726 25806056 26199441 27102870 28323720 29031813 29110490 30032910 32257570 32924968 34932588 36137160 37040589 38709084 40043880 41156210 42485580 43665735 47512440 48386355 49387452 52398882 54205740 58063626 58220980 60065820 61734315 64515140 69865176 74081178 77418168 78598323 82312420 84971160 87095439 87331470 96772710 98774904 104797764 108411480 111121767 116127252 116441960 119353009 120131640 123468630 129030280 130997205 145159065 148162356 157196646 164624840 174190878 174662940 185202945 193545420 209595528 222243534 232254504 238706018 246937260 261994410 290318130 296324712 314393292 348381756 349325880 358059027 370405890 387090840 392991615 435477195 444487068 477412036 493874520 523988820 555608835 580636260 596765045 628786584 696763512 716118054 740811780 785983230 870954390 888974136 954824072 1047977640 1074177081 1111217670 1161272520 1193530090 1432236108 1481623560 1571966460 1741908780 1790295135 2148354162 2222435340 2387060180 2864472216 3143932920 3222531243 3483817560 3580590270 4296708324 4444870680 4774120360 5370885405 6445062486 7161180540 8593416648 10741770810 12890124972 14322361080 16112656215 21483541620 25780249944 32225312430 42967083240 64450624860 128901249720
• Sum of all divisors σ(n): 467806752000
• Sum of proper divisors (its aliquot sum) s(n): 338905502280
• 128901249720 is an abundant number, because the sum of its proper divisors (338905502280) is greater than itself. Its abundance is 210004252560

Bases of 128901249720

• Binary: 1111000000011000111001111101010111000₂
• Hexadecimal: 0x1E031CFAB8
• Base-36: 1N7SH4U0

Squares and roots of 128901249720

• 128901249720 squared (128901249720²) is 16615532179377800078400
• 128901249720 cubed (128901249720³) is 2141762862684673642130073978048000
• The square root of 128901249720 is 359028.2018449247
• The cube root of 128901249720 is 5051.4847083057

Scales and comparisons

• 128,901,249,720 seconds is equal to 4,098 years, 34 weeks, 2 days, 14 hours, 42 minutes.
• To count from 1 to 128,901,249,720 would take you about eight thousand, one hundred ninety-seven 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 128901249720 cubic inches would be around 421 feet tall.

Recreational maths with 128901249720

• 128901249720 backwards is 027942109821
• 128901249720 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128901249720's digits is 45
• More coming soon!