81390438000
81,390,438,000 is an even composite number composed of five prime numbers multiplied together.
81390438000 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred forty divisors.
Prime factorization of 81390438000:
24 × 32 × 53 × 31 × 145861
(2 × 2 × 2 × 2 × 3 × 3 × 5 × 5 × 5 × 31 × 145861)See below for interesting mathematical facts about the number 81390438000 from the Numbermatics database.
Names of 81390438000
- Cardinal: 81390438000 can be written as Eighty-one billion, three hundred ninety million, four hundred thirty-eight thousand.
Scientific notation
- Scientific notation: 8.1390438 × 1010
Factors of 81390438000
Divisors of 81390438000
- Number of divisors d(n): 240
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 31 36 40 45 48 50 60 62 72 75 80 90 93 100 120 124 125 144 150 155 180 186 200 225 240 248 250 279 300 310 360 372 375 400 450 465 496 500 558 600 620 720 744 750 775 900 930 1000 1116 1125 1200 1240 1395 1488 1500 1550 1800 1860 2000 2232 2250 2325 2480 2790 3000 3100 3600 3720 3875 4464 4500 4650 5580 6000 6200 6975 7440 7750 9000 9300 11160 11625 12400 13950 15500 18000 18600 22320 23250 27900 31000 34875 37200 46500 55800 62000 69750 93000 111600 139500 145861 186000 279000 291722 437583 558000 583444 729305 875166 1166888 1312749 1458610 1750332 2187915 2333776 2625498 2917220 3500664 3646525 4375830 4521691 5250996 5834440 6563745 7001328 7293050 8751660 9043382 10501992 10939575 11668880 13127490 13565073 14586100 17503320 18086764 18232625 21003984 21879150 22608455 26254980 27130146 29172200 32818725 35006640 36173528 36465250 40695219 43758300 45216910 52509960 54260292 54697875 58344400 65637450 67825365 72347056 72930500 81390438 87516600 90433820 105019920 108520584 109395750 113042275 131274900 135650730 145861000 162780876 164093625 175033200 180867640 203476095 217041168 218791500 226084550 262549800 271301460 291722000 325561752 328187250 339126825 361735280 406952190 437583000 452169100 525099600 542602920 565211375 651123504 656374500 678253650 813904380 875166000 904338200 1017380475 1085205840 1130422750 1312749000 1356507300 1627808760 1695634125 1808676400 2034760950 2260845500 2625498000 2713014600 3255617520 3391268250 4069521900 4521691000 5086902375 5426029200 6782536500 8139043800 9043382000 10173804750 13565073000 16278087600 20347609500 27130146000 40695219000 81390438000
- Sum of all divisors σ(n): 293441670912
- Sum of proper divisors (its aliquot sum) s(n): 212051232912
- 81390438000 is an abundant number, because the sum of its proper divisors (212051232912) is greater than itself. Its abundance is 130660794912
Bases of 81390438000
- Binary: 10010111100110011111110000110011100002
- Hexadecimal: 0x12F33F8670
- Base-36: 11E1RJW0
Squares and roots of 81390438000
- 81390438000 squared (813904380002) is 6624403397831844000000
- 81390438000 cubed (813904380003) is 539163094038222033507672000000000
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The
square root of 81390438000 is 285290.0944652653 -
The
cube root of 81390438000 is 4333.6895341645
Scales and comparisons
How big is 81390438000?- 81,390,438,000 seconds is equal to 2,587 years, 50 weeks, 23 hours.
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To count from 1 to 81,390,438,000 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 81390438000 cubic inches would be around 361.1 feet tall.
Recreational maths with 81390438000
- 81390438000 backwards is 00083409318
- 81390438000 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81390438000's digits is 36
- More coming soon!
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