128998870
128,998,870 is an even composite number composed of six prime numbers multiplied together.
128998870 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 128998870:
2 × 5 × 73 × 11 × 13 × 263
(2 × 5 × 7 × 7 × 7 × 11 × 13 × 263)See below for interesting mathematical facts about the number 128998870 from the Numbermatics database.
Names of 128998870
- Cardinal: 128998870 can be written as One hundred twenty-eight million, nine hundred ninety-eight thousand, eight hundred seventy.
Scientific notation
- Scientific notation: 1.2899887 × 108
Factors of 128998870
Divisors of 128998870
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 5 7 10 11 13 14 22 26 35 49 55 65 70 77 91 98 110 130 143 154 182 245 263 286 343 385 455 490 526 539 637 686 715 770 910 1001 1078 1274 1315 1430 1715 1841 2002 2630 2695 2893 3185 3419 3430 3682 3773 4459 5005 5390 5786 6370 6838 7007 7546 8918 9205 10010 12887 14014 14465 17095 18410 18865 20251 22295 23933 25774 28930 34190 35035 37609 37730 40502 44590 47866 49049 64435 70070 75218 90209 98098 101255 119665 128870 141757 167531 180418 188045 202510 239330 245245 263263 283514 335062 376090 451045 490490 526526 708785 837655 902090 992299 1172717 1316315 1417570 1675310 1842841 1984598 2345434 2632630 3685682 4961495 5863585 9214205 9922990 11727170 12899887 18428410 25799774 64499435 128998870
- Sum of all divisors σ(n): 319334400
- Sum of proper divisors (its aliquot sum) s(n): 190335530
- 128998870 is an abundant number, because the sum of its proper divisors (190335530) is greater than itself. Its abundance is 61336660
Bases of 128998870
- Binary: 1111011000001011101110101102
- Hexadecimal: 0x7B05DD6
- Base-36: 24SW5Y
Squares and roots of 128998870
- 128998870 squared (1289988702) is 16640708461276900
- 128998870 cubed (1289988703) is 2146632587504158857103000
-
The
square root of 128998870 is 11357.7669460155 -
The
cube root of 128998870 is 505.2759593587
Scales and comparisons
How big is 128998870?- 128,998,870 seconds is equal to 4 years, 5 weeks, 2 days, 1 hour, 1 minute, 10 seconds.
-
To count from 1 to 128,998,870 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 128998870 cubic inches would be around 42.1 feet tall.
Recreational maths with 128998870
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