81438480
81,438,480 is an even composite number composed of five prime numbers multiplied together.
81438480 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 81438480:
24 × 33 × 5 × 37 × 1019
(2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 × 37 × 1019)See below for interesting mathematical facts about the number 81438480 from the Numbermatics database.
Names of 81438480
- Cardinal: 81438480 can be written as Eighty-one million, four hundred thirty-eight thousand, four hundred eighty.
Scientific notation
- Scientific notation: 8.143848 × 107
Factors of 81438480
Divisors of 81438480
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 37 40 45 48 54 60 72 74 80 90 108 111 120 135 144 148 180 185 216 222 240 270 296 333 360 370 432 444 540 555 592 666 720 740 888 999 1019 1080 1110 1332 1480 1665 1776 1998 2038 2160 2220 2664 2960 3057 3330 3996 4076 4440 4995 5095 5328 6114 6660 7992 8152 8880 9171 9990 10190 12228 13320 15285 15984 16304 18342 19980 20380 24456 26640 27513 30570 36684 37703 39960 40760 45855 48912 55026 61140 73368 75406 79920 81520 91710 110052 113109 122280 137565 146736 150812 183420 188515 220104 226218 244560 275130 301624 339327 366840 377030 440208 452436 550260 565545 603248 678654 733680 754060 904872 1017981 1100520 1131090 1357308 1508120 1696635 1809744 2035962 2201040 2262180 2714616 3016240 3393270 4071924 4524360 5089905 5429232 6786540 8143848 9048720 10179810 13573080 16287696 20359620 27146160 40719240 81438480
- Sum of all divisors σ(n): 288374400
- Sum of proper divisors (its aliquot sum) s(n): 206935920
- 81438480 is an abundant number, because the sum of its proper divisors (206935920) is greater than itself. Its abundance is 125497440
Bases of 81438480
- Binary: 1001101101010100111000100002
- Hexadecimal: 0x4DAA710
- Base-36: 1CHIC0
Squares and roots of 81438480
- 81438480 squared (814384802) is 6632226024710400
- 81438480 cubed (814384803) is 540118406468857416192000
-
The
square root of 81438480 is 9024.3271217305 -
The
cube root of 81438480 is 433.4542042831
Scales and comparisons
How big is 81438480?- 81,438,480 seconds is equal to 2 years, 30 weeks, 4 days, 13 hours, 48 minutes.
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To count from 1 to 81,438,480 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 81438480 cubic inches would be around 36.1 feet tall.
Recreational maths with 81438480
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