81357120
81,357,120 is an even composite number composed of six prime numbers multiplied together.
81357120 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred thirty-six divisors.
Prime factorization of 81357120:
26 × 32 × 5 × 13 × 41 × 53
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 13 × 41 × 53)See below for interesting mathematical facts about the number 81357120 from the Numbermatics database.
Names of 81357120
- Cardinal: 81357120 can be written as Eighty-one million, three hundred fifty-seven thousand, one hundred twenty.
Scientific notation
- Scientific notation: 8.135712 × 107
Factors of 81357120
Divisors of 81357120
- Number of divisors d(n): 336
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 30 32 36 39 40 41 45 48 52 53 60 64 65 72 78 80 82 90 96 104 106 117 120 123 130 144 156 159 160 164 180 192 195 205 208 212 234 240 246 260 265 288 312 318 320 328 360 369 390 410 416 424 468 477 480 492 520 530 533 576 585 615 624 636 656 689 720 738 780 795 820 832 848 936 954 960 984 1040 1060 1066 1170 1230 1248 1272 1312 1378 1440 1476 1560 1590 1599 1640 1696 1845 1872 1908 1968 2067 2080 2120 2132 2173 2340 2385 2460 2496 2544 2624 2665 2756 2880 2952 3120 3180 3198 3280 3392 3445 3690 3744 3816 3936 4134 4160 4240 4264 4346 4680 4770 4797 4920 5088 5330 5512 5904 6201 6240 6360 6396 6519 6560 6890 7380 7488 7632 7872 7995 8268 8480 8528 8692 9360 9540 9594 9840 10176 10335 10660 10865 11024 11808 12402 12480 12720 12792 13038 13120 13780 14760 15264 15990 16536 16960 17056 17384 18720 19080 19188 19557 19680 20670 21320 21730 22048 23616 23985 24804 25440 25584 26076 27560 28249 29520 30528 31005 31980 32595 33072 34112 34768 37440 38160 38376 39114 39360 41340 42640 43460 44096 47970 49608 50880 51168 52152 55120 56498 59040 62010 63960 65190 66144 69536 76320 76752 78228 82680 84747 85280 86920 95940 97785 99216 102336 104304 110240 112996 118080 124020 127920 130380 132288 139072 141245 152640 153504 156456 165360 169494 170560 173840 191880 195570 198432 208608 220480 225992 248040 254241 255840 260760 282490 307008 312912 330720 338988 347680 383760 391140 396864 417216 423735 451984 496080 508482 511680 521520 564980 625824 661440 677976 695360 767520 782280 847470 903968 992160 1016964 1043040 1129960 1251648 1271205 1355952 1535040 1564560 1694940 1807936 1984320 2033928 2086080 2259920 2542410 2711904 3129120 3389880 4067856 4519840 5084820 5423808 6258240 6779760 8135712 9039680 10169640 13559520 16271424 20339280 27119040 40678560 81357120
- Sum of all divisors σ(n): 314535312
- Sum of proper divisors (its aliquot sum) s(n): 233178192
- 81357120 is an abundant number, because the sum of its proper divisors (233178192) is greater than itself. Its abundance is 151821072
Bases of 81357120
- Binary: 1001101100101101001010000002
- Hexadecimal: 0x4D96940
- Base-36: 1CFRK0
Squares and roots of 81357120
- 81357120 squared (813571202) is 6618980974694400
- 81357120 cubed (813571203) is 538501229435929264128000
-
The
square root of 81357120 is 9019.8181799857 -
The
cube root of 81357120 is 433.3098106889
Scales and comparisons
How big is 81357120?- 81,357,120 seconds is equal to 2 years, 30 weeks, 3 days, 15 hours, 12 minutes.
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To count from 1 to 81,357,120 would take you about three 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 81357120 cubic inches would be around 36.1 feet tall.
Recreational maths with 81357120
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