129989720
129,989,720 is an even composite number composed of five prime numbers multiplied together.
129989720 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 129989720:
23 × 5 × 7 × 157 × 2957
(2 × 2 × 2 × 5 × 7 × 157 × 2957)See below for interesting mathematical facts about the number 129989720 from the Numbermatics database.
Names of 129989720
- Cardinal: 129989720 can be written as One hundred twenty-nine million, nine hundred eighty-nine thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 1.2998972 × 108
Factors of 129989720
Divisors of 129989720
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 157 280 314 628 785 1099 1256 1570 2198 2957 3140 4396 5495 5914 6280 8792 10990 11828 14785 20699 21980 23656 29570 41398 43960 59140 82796 103495 118280 165592 206990 413980 464249 827960 928498 1856996 2321245 3249743 3713992 4642490 6499486 9284980 12998972 16248715 18569960 25997944 32497430 64994860 129989720
- Sum of all divisors σ(n): 336502080
- Sum of proper divisors (its aliquot sum) s(n): 206512360
- 129989720 is an abundant number, because the sum of its proper divisors (206512360) is greater than itself. Its abundance is 76522640
Bases of 129989720
- Binary: 1111011111101111100010110002
- Hexadecimal: 0x7BF7C58
- Base-36: 25E4PK
Squares and roots of 129989720
- 129989720 squared (1299897202) is 16897327305678400
- 129989720 cubed (1299897203) is 2196478845213489626048000
-
The
square root of 129989720 is 11401.3034342569 -
The
cube root of 129989720 is 506.5663486367
Scales and comparisons
How big is 129989720?- 129,989,720 seconds is equal to 4 years, 6 weeks, 6 days, 12 hours, 15 minutes, 20 seconds.
-
To count from 1 to 129,989,720 would take you about six years!
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 129989720 cubic inches would be around 42.2 feet tall.
Recreational maths with 129989720
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