1991128021920

Names of 1991128021920

• Cardinal: 1991128021920 can be written as One trillion, nine hundred ninety-one billion, one hundred twenty-eight million, twenty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.99112802192 × 10¹²

Factors of 1991128021920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 51706

Divisors of 1991128021920

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 17 18 19 20 24 30 32 34 36 38 40 45 48 51 57 60 68 72 76 80 83 85 90 95 96 102 114 120 136 144 152 153 160 166 170 171 180 190 204 228 240 249 255 272 285 288 304 306 323 332 340 342 360 380 408 415 456 480 498 510 544 570 608 612 646 664 680 684 720 747 760 765 816 830 855 912 969 996 1020 1140 1224 1245 1292 1328 1360 1368 1411 1440 1494 1520 1530 1577 1615 1632 1660 1710 1824 1938 1992 2040 2280 2448 2490 2584 2656 2720 2736 2822 2907 2988 3040 3060 3154 3230 3320 3420 3735 3876 3984 4080 4233 4560 4731 4845 4896 4980 5168 5472 5644 5814 5976 6120 6308 6460 6640 6840 7055 7470 7752 7885 7968 8160 8466 9120 9462 9690 9960 10336 11288 11628 11952 12240 12616 12699 12920 13280 13680 14110 14193 14535 14940 15504 15770 16932 18924 19380 19920 21165 22576 23256 23655 23904 24480 25232 25398 25840 26809 27360 28220 28386 29070 29880 31008 31540 33864 37848 38760 39840 42330 45152 46512 47310 50464 50796 51577 51680 53618 56440 56772 58140 59760 63080 63495 67728 70965 75696 77520 80427 84660 93024 94620 101592 103154 107236 112880 113544 116280 119520 126160 126990 134045 135456 141930 151392 154731 155040 160854 169320 189240 203184 206308 214472 225760 227088 232560 241281 252320 253980 257885 268090 283860 309462 321708 338640 378480 402135 406368 412616 428944 454176 464193 465120 482562 507960 515770 536180 567720 618924 643416 677280 756960 773655 804270 825232 857888 876809 928386 965124 979963 1015920 1031540 1072360 1135440 1206405 1237848 1286832 1547310 1608540 1650464 1753618 1856772 1930248 1959926 2031840 2063080 2144720 2270880 2320965 2412810 2475696 2573664 2630427 2939889 3094620 3217080 3507236 3713544 3860496 3919852 4126160 4280891 4289440 4384045 4641930 4825620 4899815 4951392 5260854 5879778 6189240 6434160 7014472 7427088 7720992 7839704 7891281 8252320 8561782 8768090 8819667 9283860 9651240 9799630 10521708 11759556 12378480 12842673 12868320 13152135 14028944 14699445 14854176 15679408 15782562 16659371 17123564 17536180 17639334 18567720 19302480 19599260 21043416 21404455 23519112 24756960 25685346 26304270 28057888 29398890 31358816 31565124 33318742 34247128 35072360 35278668 37135440 38528019 38604960 39198520 39456405 42086832 42808910 44098335 47038224 49978113 51370692 52608540 58797780 63130248 64213365 66637484 68494256 70144720 70557336 72775147 74270880 77056038 78397040 78912810 81336929 83296855 84173664 85617820 88196670 94076448 99956226 102741384 105217080 117595560 126260496 128426730 133274968 136988512 140289440 141114672 145550294 149934339 154112076 156794080 157825620 162673858 166593710 171235640 176393340 192640095 199912452 205482768 210434160 218325441 235191120 244010787 249890565 252520992 256853460 266549936 282229344 291100588 299868678 308224152 315651240 325347716 333187420 342471280 352786680 363875735 385280190 399824904 406684645 410965536 420868320 436650882 470382240 488021574 499781130 513706920 533099872 582201176 599737356 616448304 631302480 650695432 654976323 666374840 684942560 705573360 727751470 732032361 749671695 770560380 799649808 813369290 873301764 976043148 999562260 1027413840 1091627205 1164402352 1199474712 1220053935 1232896608 1262604960 1301390864 1309952646 1332749680 1382727793 1411146720 1455502940 1464064722 1499343390 1541120760 1599299616 1626738580 1746603528 1952086296 1999124520 2054827680 2183254410 2328804704 2398949424 2440107870 2602781728 2619905292 2665499360 2765455586 2911005880 2928129444 2998686780 3082241520 3253477160 3274881615 3493207056 3660161805 3904172592 3998249040 4148183379 4366508820 4797898848 4880215740 5239810584 5530911172 5822011760 5856258888 5997373560 6164483040 6506954320 6549763230 6913638965 6986414112 7320323610 7808345184 7996498080 8296366758 8733017640 9760431480 10479621168 11061822344 11644023520 11712517776 11994747120 12444550137 13013908640 13099526460 13827277930 14640647220 16592733516 17466035280 19520862960 20740916895 20959242336 22123644688 23425035552 23989494240 24889100274 26199052920 27654555860 29281294440 33185467032 34932070560 39041725920 41481833790 44247289376 49778200548 52398105840 55309111720 58562588880 62222750685 66370934064 82963667580 99556401096 104796211680 110618223440 117125177760 124445501370 132741868128 165927335160 199112802192 221236446880 248891002740 331854670320 398225604384 497782005480 663709340640 995564010960 1991128021920
• Sum of all divisors σ(n): 7664457790080
• Sum of proper divisors (its aliquot sum) s(n): 5673329768160
• 1991128021920 is an abundant number, because the sum of its proper divisors (5673329768160) is greater than itself. Its abundance is 3682201746240

Bases of 1991128021920

• Binary: 11100111110011000011110100111101110100000₂
• Hexadecimal: 0x1CF987A7BA0
• Base-36: PEPM7QG0

Squares and roots of 1991128021920

• 1991128021920 squared (1991128021920²) is 3964590799675052000486400
• 1991128021920 cubed (1991128021920³) is 7894007836679217268501624509861888000
• The square root of 1991128021920 is 1411073.3580930511
• The cube root of 1991128021920 is 12580.5528968241

Scales and comparisons

• 1,991,128,021,920 seconds is equal to 63,311 years, 37 weeks, 5 hours, 12 minutes.
• To count from 1 to 1,991,128,021,920 would take you about one hundred fifty-eight thousand, two hundred seventy-nine 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 1991128021920 cubic inches would be around 1048.4 feet tall.

Recreational maths with 1991128021920

• 1991128021920 backwards is 0291208211991
• 1991128021920 is a Harshad number.
• The number of decimal digits it has is: 13
• The sum of 1991128021920's digits is 45
• More coming soon!