21129840
21,129,840 is an even composite number composed of four prime numbers multiplied together.
What does the number 21129840 look like?
This visualization shows the relationship between its 4 prime factors (large circles) and 60 divisors.
21129840 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty divisors.
Prime factorization of 21129840:
24 × 32 × 5 × 29347
(2 × 2 × 2 × 2 × 3 × 3 × 5 × 29347)See below for interesting mathematical facts about the number 21129840 from the Numbermatics database.
Names of 21129840
- Cardinal: 21129840 can be written as Twenty-one million, one hundred twenty-nine thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.112984 × 107
Factors of 21129840
Divisors of 21129840
- Number of divisors d(n): 60
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 72 80 90 120 144 180 240 360 720 29347 58694 88041 117388 146735 176082 234776 264123 293470 352164 440205 469552 528246 586940 704328 880410 1056492 1173880 1320615 1408656 1760820 2112984 2347760 2641230 3521640 4225968 5282460 7043280 10564920 21129840
- Sum of all divisors σ(n): 70963464
- Sum of proper divisors (its aliquot sum) s(n): 49833624
- 21129840 is an abundant number, because the sum of its proper divisors (49833624) is greater than itself. Its abundance is 28703784
Bases of 21129840
- Binary: 10100001001101010011100002
- Hexadecimal: 0x1426A70
- Base-36: CKVW0
Squares and roots of 21129840
- 21129840 squared (211298402) is 446470138425600
- 21129840 cubed (211298403) is 9433842589710779904000
-
The
square root of 21129840 is 4596.7205701457 -
The
cube root of 21129840 is 276.4598509219
Scales and comparisons
How big is 21129840?- 21,129,840 seconds is equal to 34 weeks, 6 days, 13 hours, 24 minutes.
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To count from 1 to 21,129,840 would take you about two 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 21129840 cubic inches would be around 23 feet tall.
Recreational maths with 21129840
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"Number 21129840 - Facts about the integer". Numbermatics.com. 2024. Web. 9 May 2024.
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The information we have on file for 21129840 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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