81400140
81,400,140 is an even composite number composed of four prime numbers multiplied together.
81400140 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 81400140:
22 × 37 × 5 × 1861
(2 × 2 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 1861)See below for interesting mathematical facts about the number 81400140 from the Numbermatics database.
Names of 81400140
- Cardinal: 81400140 can be written as Eighty-one million, four hundred thousand, one hundred forty.
Scientific notation
- Scientific notation: 8.140014 × 107
Factors of 81400140
Divisors of 81400140
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 81 90 108 135 162 180 243 270 324 405 486 540 729 810 972 1215 1458 1620 1861 2187 2430 2916 3645 3722 4374 4860 5583 7290 7444 8748 9305 10935 11166 14580 16749 18610 21870 22332 27915 33498 37220 43740 50247 55830 66996 83745 100494 111660 150741 167490 200988 251235 301482 334980 452223 502470 602964 753705 904446 1004940 1356669 1507410 1808892 2261115 2713338 3014820 4070007 4522230 5426676 6783345 8140014 9044460 13566690 16280028 20350035 27133380 40700070 81400140
- Sum of all divisors σ(n): 256509120
- Sum of proper divisors (its aliquot sum) s(n): 175108980
- 81400140 is an abundant number, because the sum of its proper divisors (175108980) is greater than itself. Its abundance is 93708840
Bases of 81400140
- Binary: 1001101101000010001010011002
- Hexadecimal: 0x4DA114C
- Base-36: 1CGOR0
Squares and roots of 81400140
- 81400140 squared (814001402) is 6625982792019600
- 81400140 cubed (814001403) is 539355926907986322744000
-
The
square root of 81400140 is 9022.2026135529 -
The
cube root of 81400140 is 433.3861723865
Scales and comparisons
How big is 81400140?- 81,400,140 seconds is equal to 2 years, 30 weeks, 4 days, 3 hours, 9 minutes.
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To count from 1 to 81,400,140 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 81400140 cubic inches would be around 36.1 feet tall.
Recreational maths with 81400140
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