81382443720
81,382,443,720 is an even composite number composed of seven prime numbers multiplied together.
81382443720 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 81382443720:
23 × 3 × 5 × 31 × 89 × 409 × 601
(2 × 2 × 2 × 3 × 5 × 31 × 89 × 409 × 601)See below for interesting mathematical facts about the number 81382443720 from the Numbermatics database.
Names of 81382443720
- Cardinal: 81382443720 can be written as Eighty-one billion, three hundred eighty-two million, four hundred forty-three thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 8.138244372 × 1010
Factors of 81382443720
Divisors of 81382443720
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 20 24 30 31 40 60 62 89 93 120 124 155 178 186 248 267 310 356 372 409 445 465 534 601 620 712 744 818 890 930 1068 1202 1227 1240 1335 1636 1780 1803 1860 2045 2136 2404 2454 2670 2759 3005 3272 3560 3606 3720 4090 4808 4908 5340 5518 6010 6135 7212 8180 8277 9015 9816 10680 11036 12020 12270 12679 13795 14424 16360 16554 18030 18631 22072 24040 24540 25358 27590 33108 36060 36401 37262 38037 41385 49080 50716 53489 55180 55893 63395 66216 72120 72802 74524 76074 82770 93155 101432 106978 109203 110360 111786 126790 145604 149048 152148 160467 165540 182005 186310 190185 213956 218406 223572 245809 253580 267445 279465 291208 304296 320934 331080 364010 372620 380370 427912 436812 447144 491618 507160 534890 546015 558930 641868 728020 737427 745240 760740 802335 873624 983236 1069780 1092030 1117860 1128431 1229045 1283736 1456040 1474854 1521480 1604670 1658159 1966472 2139560 2184060 2235720 2256862 2458090 2949708 3209340 3316318 3385293 3687135 4368120 4513724 4916180 4974477 5642155 5899416 6418680 6632636 6770586 7374270 7620079 8290795 9027448 9832360 9948954 11284310 13265272 13541172 14748540 15240158 16581590 16926465 19897908 21877001 22568620 22860237 24872385 27082344 29497080 30480316 33163180 33852930 38100395 39795816 43754002 45137240 45720474 49744770 60960632 65631003 66326360 67705860 76200790 87508004 91440948 99489540 109385005 114301185 131262006 135411720 152401580 175016008 182881896 198979080 218770010 228602370 262524012 304803160 328155015 437540020 457204740 525048024 656310030 678187031 875080040 914409480 1312620060 1356374062 2034561093 2625240120 2712748124 3390935155 4069122186 5425496248 6781870310 8138244372 10172805465 13563740620 16276488744 20345610930 27127481240 40691221860 81382443720
- Sum of all divisors σ(n): 255902976000
- Sum of proper divisors (its aliquot sum) s(n): 174520532280
- 81382443720 is an abundant number, because the sum of its proper divisors (174520532280) is greater than itself. Its abundance is 93138088560
Bases of 81382443720
- Binary: 10010111100101100010110001010110010002
- Hexadecimal: 0x12F2C58AC8
- Base-36: 11DX07GO
Squares and roots of 81382443720
- 81382443720 squared (813824437202) is 6623102145838967438400
- 81382443720 cubed (813824437203) is 539004237635550999738500566848000
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The
square root of 81382443720 is 285276.0833298157 -
The
cube root of 81382443720 is 4333.5476425501
Scales and comparisons
How big is 81382443720?- 81,382,443,720 seconds is equal to 2,587 years, 36 weeks, 6 days, 10 hours, 22 minutes.
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To count from 1 to 81,382,443,720 would take you about five thousand, one hundred seventy-five 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 81382443720 cubic inches would be around 361.1 feet tall.
Recreational maths with 81382443720
- 81382443720 backwards is 02734428318
- The number of decimal digits it has is: 11
- The sum of 81382443720's digits is 42
- More coming soon!
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