1981728
1,981,728 is an even composite number composed of four prime numbers multiplied together.
1981728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 1981728:
25 × 32 × 7 × 983
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 7 × 983)See below for interesting mathematical facts about the number 1981728 from the Numbermatics database.
Names of 1981728
- Cardinal: 1981728 can be written as One million, nine hundred eighty-one thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 1.981728 × 106
Factors of 1981728
Divisors of 1981728
- Number of divisors d(n): 72
-
Complete list of divisors:
1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 32 36 42 48 56 63 72 84 96 112 126 144 168 224 252 288 336 504 672 983 1008 1966 2016 2949 3932 5898 6881 7864 8847 11796 13762 15728 17694 20643 23592 27524 31456 35388 41286 47184 55048 61929 70776 82572 94368 110096 123858 141552 165144 220192 247716 283104 330288 495432 660576 990864 1981728
- Sum of all divisors σ(n): 6447168
- Sum of proper divisors (its aliquot sum) s(n): 4465440
- 1981728 is an abundant number, because the sum of its proper divisors (4465440) is greater than itself. Its abundance is 2483712
Bases of 1981728
- Binary: 1111000111101001000002
- Hexadecimal: 0x1E3D20
- Base-36: 16H40
Squares and roots of 1981728
- 1981728 squared (19817282) is 3927245865984
- 1981728 cubed (19817283) is 7782733095504740352
-
The
square root of 1981728 is 1407.7386121009 -
The
cube root of 1981728 is 125.6072426077
Scales and comparisons
How big is 1981728?- 1,981,728 seconds is equal to 3 weeks, 1 day, 22 hours, 28 minutes, 48 seconds.
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To count from 1 to 1,981,728 would take you about four weeks!
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 1981728 cubic inches would be around 10.5 feet tall.
Recreational maths with 1981728
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The information we have on file for 1981728 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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