21289380
21,289,380 is an even composite number composed of six prime numbers multiplied together.
21289380 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21289380:
22 × 3 × 5 × 7 × 173 × 293
(2 × 2 × 3 × 5 × 7 × 173 × 293)See below for interesting mathematical facts about the number 21289380 from the Numbermatics database.
Names of 21289380
- Cardinal: 21289380 can be written as Twenty-one million, two hundred eighty-nine thousand, three hundred eighty.
Scientific notation
- Scientific notation: 2.128938 × 107
Factors of 21289380
Divisors of 21289380
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 173 210 293 346 420 519 586 692 865 879 1038 1172 1211 1465 1730 1758 2051 2076 2422 2595 2930 3460 3516 3633 4102 4395 4844 5190 5860 6055 6153 7266 8204 8790 10255 10380 12110 12306 14532 17580 18165 20510 24220 24612 30765 36330 41020 50689 61530 72660 101378 123060 152067 202756 253445 304134 354823 506890 608268 709646 760335 1013780 1064469 1419292 1520670 1774115 2128938 3041340 3548230 4257876 5322345 7096460 10644690 21289380
- Sum of all divisors σ(n): 68753664
- Sum of proper divisors (its aliquot sum) s(n): 47464284
- 21289380 is an abundant number, because the sum of its proper divisors (47464284) is greater than itself. Its abundance is 26174904
Bases of 21289380
- Binary: 10100010011011001101001002
- Hexadecimal: 0x144D9A4
- Base-36: COAZO
Squares and roots of 21289380
- 21289380 squared (212893802) is 453237700784400
- 21289380 cubed (212893803) is 9649149642325389672000
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The
square root of 21289380 is 4614.0416122961 -
The
cube root of 21289380 is 277.1539066595
Scales and comparisons
How big is 21289380?- 21,289,380 seconds is equal to 35 weeks, 1 day, 9 hours, 43 minutes.
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To count from 1 to 21,289,380 would take you about five days!
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 21289380 cubic inches would be around 23.1 feet tall.
Recreational maths with 21289380
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The information we have on file for 21289380 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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