81972858240

Names of 81972858240

• Cardinal: 81972858240 can be written as Eighty-one billion, nine hundred seventy-two million, eight hundred fifty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.197285824 × 10¹⁰

Factors of 81972858240

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 8280

Divisors of 81972858240

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 19 20 21 24 26 28 30 32 35 36 38 39 40 42 45 48 52 56 57 60 63 64 65 70 72 76 78 80 84 90 91 95 96 104 105 112 114 117 120 126 128 130 133 140 144 152 156 160 168 171 180 182 190 192 195 208 210 224 228 234 240 247 252 260 266 273 280 285 288 304 312 315 320 336 342 360 364 380 384 390 399 416 420 448 455 456 468 480 494 504 520 532 546 560 570 576 585 608 624 630 640 665 672 684 720 728 741 760 780 798 819 832 840 855 896 910 912 936 960 988 1008 1040 1064 1092 1120 1140 1152 1170 1197 1216 1235 1248 1260 1330 1344 1365 1368 1440 1456 1482 1520 1560 1596 1638 1664 1680 1710 1729 1820 1824 1872 1920 1976 1995 2016 2080 2128 2184 2223 2240 2280 2340 2394 2432 2470 2496 2520 2660 2688 2730 2736 2880 2912 2964 3040 3120 3192 3276 3360 3420 3458 3640 3648 3705 3744 3952 3990 4032 4095 4160 4256 4368 4446 4480 4560 4680 4788 4940 4992 5040 5187 5320 5460 5472 5760 5824 5928 5985 6080 6240 6384 6552 6720 6840 6916 7280 7296 7410 7488 7904 7980 8064 8190 8231 8320 8512 8645 8736 8892 9120 9360 9576 9880 10080 10374 10640 10920 10944 11115 11648 11856 11970 12160 12480 12768 13104 13440 13680 13832 14560 14820 14976 15561 15808 15960 16380 16462 17024 17290 17472 17784 18240 18720 19152 19760 20160 20748 21280 21840 21888 22230 23712 23940 24693 24960 25536 25935 26208 27360 27664 29120 29640 31122 31616 31920 32760 32924 34580 34944 35568 36480 37440 38304 39520 40320 41155 41496 42560 43680 44460 47424 47880 49386 51072 51870 52416 54720 55328 57617 58240 59280 62244 63840 65520 65848 69160 71136 74079 74880 76608 77805 79040 82310 82992 85120 87360 88920 94848 95760 98772 103740 104832 107003 109440 110656 115234 118560 123465 124488 127680 131040 131696 138320 142272 148158 153216 155610 156389 158080 164620 165984 172851 174720 177840 191520 197544 207480 214006 221312 230468 237120 246930 248976 255360 262080 263392 276640 284544 288085 296316 311220 312778 321009 329240 331968 345702 355680 370395 383040 395088 414960 428012 460936 469167 474240 493860 497952 518553 524160 526784 535015 553280 576170 592632 622440 625556 642018 658480 663936 691404 711360 740790 749021 766080 781945 790176 829920 856024 864255 921872 938334 963027 987720 995904 1037106 1053568 1070030 1094723 1106560 1152340 1185264 1244880 1251112 1284036 1316960 1382808 1407501 1422720 1481580 1498042 1563890 1580352 1605045 1659840 1712048 1728510 1843744 1876668 1926054 1975440 1991808 2033057 2074212 2140060 2189446 2247063 2304680 2345835 2370528 2489760 2502224 2568072 2592765 2633920 2765616 2815002 2963160 2996084 3127780 3160704 3210090 3284169 3319680 3424096 3457020 3687488 3745105 3753336 3852108 3950880 4066114 4148424 4280120 4378892 4494126 4609360 4691670 4741056 4815135 4979520 5004448 5136144 5185530 5267840 5473615 5531232 5630004 5926320 5992168 6099171 6255560 6420180 6568338 6741189 6848192 6914040 7037505 7374976 7490210 7506672 7704216 7901760 8132228 8296848 8560240 8757784 8988252 9218720 9383340 9482112 9630270 9852507 9959040 10008896 10165285 10272288 10371060 10947230 11062464 11235315 11260008 11852640 11984336 12198342 12511120 12840360 13136676 13482378 13696384 13828080 14075010 14231399 14980420 15013344 15408432 15803520 16264456 16420845 16593696 17120480 17515568 17976504 18297513 18437440 18766680 19260540 19705014 20017792 20330570 20544576 20742120 21894460 22124928 22470630 22520016 23705280 23968672 24396684 25022240 25680720 26273352 26964756 27656160 28150020 28462798 29960840 30026688 30495855 30816864 32528912 32841690 33187392 33705945 34240960 35031136 35953008 36595026 36874880 37533360 38521080 39410028 40661140 41089152 41484240 42694197 43788920 44941260 45040032 47410560 47937344 48793368 49262535 50044480 51361440 52546704 53929512 55312320 56300040 56925596 59921680 60053376 60991710 61633728 65057824 65683380 66374784 67411890 68481920 70062272 71156995 71906016 73190052 75066720 77042160 78820056 81322280 82968480 85388394 87577840 89882520 90080064 91487565 95874688 97586736 98525070 100088960 102722880 105093408 107859024 110624640 112600080 113851192 119843360 121983420 123267456 128082591 130115648 131366760 134823780 140124544 142313990 143812032 146380104 150133440 154084320 157640112 162644560 165936960 170776788 175155680 179765040 180160128 182975130 195173472 197050140 205445760 210186816 213470985 215718048 225200160 227702384 239686720 243966840 256165182 260231296 262733520 269647560 284627980 287624064 292760208 300266880 308168640 315280224 325289120 331873920 341553576 350311360 359530080 365950260 390346944 394100280 420373632 426941970 431436096 450400320 455404768 479373440 487933680 512330364 525467040 539295120 569255960 585520416 616337280 630560448 640412955 650578240 683107152 700622720 719060160 731900520 780693888 788200560 853883940 862872192 900800640 910809536 975867360 1024660728 1050934080 1078590240 1138511920 1171040832 1261120896 1280825910 1301156480 1366214304 1438120320 1463801040 1576401120 1707767880 1821619072 1951734720 2049321456 2101868160 2157180480 2277023840 2342081664 2561651820 2732428608 2927602080 3152802240 3415535760 3903469440 4098642912 4314360960 4554047680 5123303640 5464857216 5855204160 6305604480 6831071520 8197285824 9108095360 10246607280 11710408320 13662143040 16394571648 20493214560 27324286080 40986429120 81972858240
• Sum of all divisors σ(n): 366765235200
• Sum of proper divisors (its aliquot sum) s(n): 284792376960
• 81972858240 is an abundant number, because the sum of its proper divisors (284792376960) is greater than itself. Its abundance is 202819518720

Bases of 81972858240

• Binary: 1001100010101111101101000110110000000₂
• Hexadecimal: 0x1315F68D80
• Base-36: 11NOIU80

Squares and roots of 81972858240

• 81972858240 squared (81972858240²) is 6719549488035135897600
• 81972858240 cubed (81972858240³) is 550820677619368771073099956224000
• The square root of 81972858240 is 286309.0257745991
• The cube root of 81972858240 is 4344.0020959871

Scales and comparisons

• 81,972,858,240 seconds is equal to 2,606 years, 25 weeks, 22 hours, 24 minutes.
• To count from 1 to 81,972,858,240 would take you about five thousand, two hundred twelve 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 81972858240 cubic inches would be around 362 feet tall.

Recreational maths with 81972858240

• 81972858240 backwards is 04285827918
• The number of decimal digits it has is: 11
• The sum of 81972858240's digits is 54
• More coming soon!