128187920
128,187,920 is an even composite number composed of five prime numbers multiplied together.
128187920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 128187920:
24 × 5 × 72 × 53 × 617
(2 × 2 × 2 × 2 × 5 × 7 × 7 × 53 × 617)See below for interesting mathematical facts about the number 128187920 from the Numbermatics database.
Names of 128187920
- Cardinal: 128187920 can be written as One hundred twenty-eight million, one hundred eighty-seven thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 1.2818792 × 108
Factors of 128187920
Divisors of 128187920
- Number of divisors d(n): 120
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 35 40 49 53 56 70 80 98 106 112 140 196 212 245 265 280 371 392 424 490 530 560 617 742 784 848 980 1060 1234 1484 1855 1960 2120 2468 2597 2968 3085 3710 3920 4240 4319 4936 5194 5936 6170 7420 8638 9872 10388 12340 12985 14840 17276 20776 21595 24680 25970 29680 30233 32701 34552 41552 43190 49360 51940 60466 65402 69104 86380 103880 120932 130804 151165 163505 172760 207760 228907 241864 261608 302330 327010 345520 457814 483728 523216 604660 654020 915628 1144535 1209320 1308040 1602349 1831256 2289070 2418640 2616080 3204698 3662512 4578140 6409396 8011745 9156280 12818792 16023490 18312560 25637584 32046980 64093960 128187920
- Sum of all divisors σ(n): 353809944
- Sum of proper divisors (its aliquot sum) s(n): 225622024
- 128187920 is an abundant number, because the sum of its proper divisors (225622024) is greater than itself. Its abundance is 97434104
Bases of 128187920
- Binary: 1111010001111111110000100002
- Hexadecimal: 0x7A3FE10
- Base-36: 24BIFK
Squares and roots of 128187920
- 128187920 squared (1281879202) is 16432142833926400
- 128187920 cubed (1281879203) is 2106402211023930649088000
-
The
square root of 128187920 is 11322.0104221821 -
The
cube root of 128187920 is 504.2149289075
Scales and comparisons
How big is 128187920?- 128,187,920 seconds is equal to 4 years, 3 weeks, 6 days, 15 hours, 45 minutes, 20 seconds.
-
To count from 1 to 128,187,920 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 128187920 cubic inches would be around 42 feet tall.
Recreational maths with 128187920
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