81426440
81,426,440 is an even composite number composed of five prime numbers multiplied together.
81426440 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 81426440:
23 × 5 × 23 × 67 × 1321
(2 × 2 × 2 × 5 × 23 × 67 × 1321)See below for interesting mathematical facts about the number 81426440 from the Numbermatics database.
Names of 81426440
- Cardinal: 81426440 can be written as Eighty-one million, four hundred twenty-six thousand, four hundred forty.
Scientific notation
- Scientific notation: 8.142644 × 107
Factors of 81426440
Divisors of 81426440
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 5 8 10 20 23 40 46 67 92 115 134 184 230 268 335 460 536 670 920 1321 1340 1541 2642 2680 3082 5284 6164 6605 7705 10568 12328 13210 15410 26420 30383 30820 52840 60766 61640 88507 121532 151915 177014 243064 303830 354028 442535 607660 708056 885070 1215320 1770140 2035661 3540280 4071322 8142644 10178305 16285288 20356610 40713220 81426440
- Sum of all divisors σ(n): 194175360
- Sum of proper divisors (its aliquot sum) s(n): 112748920
- 81426440 is an abundant number, because the sum of its proper divisors (112748920) is greater than itself. Its abundance is 31322480
Bases of 81426440
- Binary: 1001101101001111000000010002
- Hexadecimal: 0x4DA7808
- Base-36: 1CH91K
Squares and roots of 81426440
- 81426440 squared (814264402) is 6630265131073600
- 81426440 cubed (814264403) is 539878885879456625984000
-
The
square root of 81426440 is 9023.6600113257 -
The
cube root of 81426440 is 433.4328423677
Scales and comparisons
How big is 81426440?- 81,426,440 seconds is equal to 2 years, 30 weeks, 4 days, 10 hours, 27 minutes, 20 seconds.
-
To count from 1 to 81,426,440 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 81426440 cubic inches would be around 36.1 feet tall.
Recreational maths with 81426440
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