28379820
28,379,820 is an even composite number composed of five prime numbers multiplied together.
28379820 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 28379820:
22 × 3 × 5 × 74 × 197
(2 × 2 × 3 × 5 × 7 × 7 × 7 × 7 × 197)See below for interesting mathematical facts about the number 28379820 from the Numbermatics database.
Names of 28379820
- Cardinal: 28379820 can be written as Twenty-eight million, three hundred seventy-nine thousand, eight hundred twenty.
Scientific notation
- Scientific notation: 2.837982 × 107
Factors of 28379820
Divisors of 28379820
- Number of divisors d(n): 120
-
Complete list of divisors:
1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 49 60 70 84 98 105 140 147 196 197 210 245 294 343 394 420 490 588 591 686 735 788 980 985 1029 1182 1372 1379 1470 1715 1970 2058 2364 2401 2758 2940 2955 3430 3940 4116 4137 4802 5145 5516 5910 6860 6895 7203 8274 9604 9653 10290 11820 12005 13790 14406 16548 19306 20580 20685 24010 27580 28812 28959 36015 38612 41370 48020 48265 57918 67571 72030 82740 96530 115836 135142 144060 144795 193060 202713 270284 289590 337855 405426 472997 579180 675710 810852 945994 1013565 1351420 1418991 1891988 2027130 2364985 2837982 4054260 4729970 5675964 7094955 9459940 14189910 28379820
- Sum of all divisors σ(n): 93172464
- Sum of proper divisors (its aliquot sum) s(n): 64792644
- 28379820 is an abundant number, because the sum of its proper divisors (64792644) is greater than itself. Its abundance is 36412824
Bases of 28379820
- Binary: 11011000100001010101011002
- Hexadecimal: 0x1B10AAC
- Base-36: GWA0C
Squares and roots of 28379820
- 28379820 squared (283798202) is 805414183232400
- 28379820 cubed (283798203) is 22857509545582530168000
-
The
square root of 28379820 is 5327.2713465713 -
The
cube root of 28379820 is 305.0257794209
Scales and comparisons
How big is 28379820?- 28,379,820 seconds is equal to 46 weeks, 6 days, 11 hours, 17 minutes.
-
To count from 1 to 28,379,820 would take you about eighteen weeks!
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 28379820 cubic inches would be around 25.4 feet tall.
Recreational maths with 28379820
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