728428320
728,428,320 is an even composite number composed of five prime numbers multiplied together.
728428320 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 728428320:
25 × 32 × 5 × 193 × 2621
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 193 × 2621)See below for interesting mathematical facts about the number 728428320 from the Numbermatics database.
Names of 728428320
- Cardinal: 728428320 can be written as Seven hundred twenty-eight million, four hundred twenty-eight thousand, three hundred twenty.
Scientific notation
- Scientific notation: 7.2842832 × 108
Factors of 728428320
Divisors of 728428320
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 60 72 80 90 96 120 144 160 180 193 240 288 360 386 480 579 720 772 965 1158 1440 1544 1737 1930 2316 2621 2895 3088 3474 3860 4632 5242 5790 6176 6948 7720 7863 8685 9264 10484 11580 13105 13896 15440 15726 17370 18528 20968 23160 23589 26210 27792 30880 31452 34740 39315 41936 46320 47178 52420 55584 62904 69480 78630 83872 92640 94356 104840 117945 125808 138960 157260 188712 209680 235890 251616 277920 314520 377424 419360 471780 505853 629040 754848 943560 1011706 1258080 1517559 1887120 2023412 2529265 3035118 3774240 4046824 4552677 5058530 6070236 7587795 8093648 9105354 10117060 12140472 15175590 16187296 18210708 20234120 22763385 24280944 30351180 36421416 40468240 45526770 48561888 60702360 72842832 80936480 91053540 121404720 145685664 182107080 242809440 364214160 728428320
- Sum of all divisors σ(n): 2499594552
- Sum of proper divisors (its aliquot sum) s(n): 1771166232
- 728428320 is an abundant number, because the sum of its proper divisors (1771166232) is greater than itself. Its abundance is 1042737912
Bases of 728428320
- Binary: 1010110110101011101111001000002
- Hexadecimal: 0x2B6AEF20
- Base-36: C1OQW0
Squares and roots of 728428320
- 728428320 squared (7284283202) is 530607817378022400
- 728428320 cubed (7284283203) is 386509760991539661754368000
-
The
square root of 728428320 is 26989.4112570097 -
The
cube root of 728428320 is 899.7646792173
Scales and comparisons
How big is 728428320?- 728,428,320 seconds is equal to 23 years, 8 weeks, 2 days, 21 hours, 12 minutes.
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To count from 1 to 728,428,320 would take you about thirty-four 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 728428320 cubic inches would be around 75 feet tall.
Recreational maths with 728428320
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