21388500
21,388,500 is an even composite number composed of five prime numbers multiplied together.
21388500 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred sixteen divisors.
Prime factorization of 21388500:
22 × 32 × 53 × 72 × 97
(2 × 2 × 3 × 3 × 5 × 5 × 5 × 7 × 7 × 97)See below for interesting mathematical facts about the number 21388500 from the Numbermatics database.
Names of 21388500
- Cardinal: 21388500 can be written as Twenty-one million, three hundred eighty-eight thousand, five hundred.
Scientific notation
- Scientific notation: 2.13885 × 107
Factors of 21388500
Divisors of 21388500
- Number of divisors d(n): 216
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Complete list of divisors:
1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 25 28 30 35 36 42 45 49 50 60 63 70 75 84 90 97 98 100 105 125 126 140 147 150 175 180 194 196 210 225 245 250 252 291 294 300 315 350 375 388 420 441 450 485 490 500 525 582 588 630 679 700 735 750 873 875 882 900 970 980 1050 1125 1164 1225 1260 1358 1455 1470 1500 1575 1746 1750 1764 1940 2037 2100 2205 2250 2425 2450 2625 2716 2910 2940 3150 3395 3492 3500 3675 4074 4365 4410 4500 4753 4850 4900 5250 5820 6111 6125 6300 6790 7275 7350 7875 8148 8730 8820 9506 9700 10185 10500 11025 12125 12222 12250 13580 14259 14550 14700 15750 16975 17460 18375 19012 20370 21825 22050 23765 24250 24444 24500 28518 29100 30555 31500 33950 36375 36750 40740 42777 43650 44100 47530 48500 50925 55125 57036 61110 67900 71295 72750 73500 84875 85554 87300 95060 101850 109125 110250 118825 122220 142590 145500 152775 169750 171108 203700 213885 218250 220500 237650 254625 285180 305550 339500 356475 427770 436500 475300 509250 594125 611100 712950 763875 855540 1018500 1069425 1188250 1425900 1527750 1782375 2138850 2376500 3055500 3564750 4277700 5347125 7129500 10694250 21388500
- Sum of all divisors σ(n): 79298856
- Sum of proper divisors (its aliquot sum) s(n): 57910356
- 21388500 is an abundant number, because the sum of its proper divisors (57910356) is greater than itself. Its abundance is 36521856
Bases of 21388500
- Binary: 10100011001011100110101002
- Hexadecimal: 0x1465CD4
- Base-36: CQFH0
Squares and roots of 21388500
- 21388500 squared (213885002) is 457467932250000
- 21388500 cubed (213885003) is 9784552868929125000000
-
The
square root of 21388500 is 4624.7702645647 -
The
cube root of 21388500 is 277.5833691561
Scales and comparisons
How big is 21388500?- 21,388,500 seconds is equal to 35 weeks, 2 days, 13 hours, 15 minutes.
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To count from 1 to 21,388,500 would take you about seven hours!
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 21388500 cubic inches would be around 23.1 feet tall.
Recreational maths with 21388500
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The information we have on file for 21388500 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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