81380040
81,380,040 is an even composite number composed of six prime numbers multiplied together.
81380040 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 81380040:
23 × 3 × 5 × 7 × 19 × 5099
(2 × 2 × 2 × 3 × 5 × 7 × 19 × 5099)See below for interesting mathematical facts about the number 81380040 from the Numbermatics database.
Names of 81380040
- Cardinal: 81380040 can be written as Eighty-one million, three hundred eighty thousand and forty.
Scientific notation
- Scientific notation: 8.138004 × 107
Factors of 81380040
Divisors of 81380040
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 14 15 19 20 21 24 28 30 35 38 40 42 56 57 60 70 76 84 95 105 114 120 133 140 152 168 190 210 228 266 280 285 380 399 420 456 532 570 665 760 798 840 1064 1140 1330 1596 1995 2280 2660 3192 3990 5099 5320 7980 10198 15297 15960 20396 25495 30594 35693 40792 50990 61188 71386 76485 96881 101980 107079 122376 142772 152970 178465 193762 203960 214158 285544 290643 305940 356930 387524 428316 484405 535395 581286 611880 678167 713860 775048 856632 968810 1070790 1162572 1356334 1427720 1453215 1937620 2034501 2141580 2325144 2712668 2906430 3390835 3875240 4069002 4283160 5425336 5812860 6781670 8138004 10172505 11625720 13563340 16276008 20345010 27126680 40690020 81380040
- Sum of all divisors σ(n): 293760000
- Sum of proper divisors (its aliquot sum) s(n): 212379960
- 81380040 is an abundant number, because the sum of its proper divisors (212379960) is greater than itself. Its abundance is 130999920
Bases of 81380040
- Binary: 1001101100111000010110010002
- Hexadecimal: 0x4D9C2C8
- Base-36: 1CG98O
Squares and roots of 81380040
- 81380040 squared (813800402) is 6622710910401600
- 81380040 cubed (813800403) is 538956478796918624064000
-
The
square root of 81380040 is 9021.0886261027 -
The
cube root of 81380040 is 433.3504976765
Scales and comparisons
How big is 81380040?- 81,380,040 seconds is equal to 2 years, 30 weeks, 3 days, 21 hours, 34 minutes.
-
To count from 1 to 81,380,040 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 81380040 cubic inches would be around 36.1 feet tall.
Recreational maths with 81380040
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The information we have on file for 81380040 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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