21742840
21,742,840 is an even composite number composed of six prime numbers multiplied together.
21742840 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 21742840:
23 × 5 × 7 × 19 × 61 × 67
(2 × 2 × 2 × 5 × 7 × 19 × 61 × 67)See below for interesting mathematical facts about the number 21742840 from the Numbermatics database.
Names of 21742840
- Cardinal: 21742840 can be written as Twenty-one million, seven hundred forty-two thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.174284 × 107
Factors of 21742840
Divisors of 21742840
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 4 5 7 8 10 14 19 20 28 35 38 40 56 61 67 70 76 95 122 133 134 140 152 190 244 266 268 280 305 335 380 427 469 488 532 536 610 665 670 760 854 938 1064 1159 1220 1273 1330 1340 1708 1876 2135 2318 2345 2440 2546 2660 2680 3416 3752 4087 4270 4636 4690 5092 5320 5795 6365 8113 8174 8540 8911 9272 9380 10184 11590 12730 16226 16348 17080 17822 18760 20435 23180 25460 28609 32452 32696 35644 40565 40870 44555 46360 50920 57218 64904 71288 77653 81130 81740 89110 114436 143045 155306 162260 163480 178220 228872 286090 310612 324520 356440 388265 543571 572180 621224 776530 1087142 1144360 1553060 2174284 2717855 3106120 4348568 5435710 10871420 21742840
- Sum of all divisors σ(n): 60710400
- Sum of proper divisors (its aliquot sum) s(n): 38967560
- 21742840 is an abundant number, because the sum of its proper divisors (38967560) is greater than itself. Its abundance is 17224720
Bases of 21742840
- Binary: 10100101111000100111110002
- Hexadecimal: 0x14BC4F8
- Base-36: CY0VS
Squares and roots of 21742840
- 21742840 squared (217428402) is 472751091265600
- 21742840 cubed (217428403) is 10278951337213338304000
-
The
square root of 21742840 is 4662.9218307837 -
The
cube root of 21742840 is 279.1078748499
Scales and comparisons
How big is 21742840?- 21,742,840 seconds is equal to 35 weeks, 6 days, 15 hours, 40 minutes, 40 seconds.
-
To count from 1 to 21,742,840 would take you about six 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 21742840 cubic inches would be around 23.3 feet tall.
Recreational maths with 21742840
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The information we have on file for 21742840 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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