81440000
81,440,000 is an even composite number composed of three prime numbers multiplied together.
81440000 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of ninety divisors.
Prime factorization of 81440000:
28 × 54 × 509
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 509)See below for interesting mathematical facts about the number 81440000 from the Numbermatics database.
Names of 81440000
- Cardinal: 81440000 can be written as Eighty-one million, four hundred forty thousand.
Scientific notation
- Scientific notation: 8.144 × 107
Factors of 81440000
Divisors of 81440000
- Number of divisors d(n): 90
-
Complete list of divisors:
1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 509 625 640 800 1000 1018 1250 1280 1600 2000 2036 2500 2545 3200 4000 4072 5000 5090 6400 8000 8144 10000 10180 12725 16000 16288 20000 20360 25450 32000 32576 40000 40720 50900 63625 65152 80000 81440 101800 127250 130304 160000 162880 203600 254500 318125 325760 407200 509000 636250 651520 814400 1018000 1272500 1628800 2036000 2545000 3257600 4072000 5090000 8144000 10180000 16288000 20360000 40720000 81440000
- Sum of all divisors σ(n): 203536410
- Sum of proper divisors (its aliquot sum) s(n): 122096410
- 81440000 is an abundant number, because the sum of its proper divisors (122096410) is greater than itself. Its abundance is 40656410
Bases of 81440000
- Binary: 1001101101010101101000000002
- Hexadecimal: 0x4DAAD00
- Base-36: 1CHJI8
Squares and roots of 81440000
- 81440000 squared (814400002) is 6632473600000000
- 81440000 cubed (814400003) is 540148649984000000000000
-
The
square root of 81440000 is 9024.4113381425 -
The
cube root of 81440000 is 433.4569009867
Scales and comparisons
How big is 81440000?- 81,440,000 seconds is equal to 2 years, 30 weeks, 4 days, 14 hours, 13 minutes, 20 seconds.
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To count from 1 to 81,440,000 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 81440000 cubic inches would be around 36.1 feet tall.
Recreational maths with 81440000
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The information we have on file for 81440000 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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