728121856
728,121,856 is an even composite number composed of five prime numbers multiplied together.
728121856 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred forty divisors.
Prime factorization of 728121856:
29 × 7 × 112 × 23 × 73
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 7 × 11 × 11 × 23 × 73)See below for interesting mathematical facts about the number 728121856 from the Numbermatics database.
Names of 728121856
- Cardinal: 728121856 can be written as Seven hundred twenty-eight million, one hundred twenty-one thousand, eight hundred fifty-six.
Scientific notation
- Scientific notation: 7.28121856 × 108
Factors of 728121856
Divisors of 728121856
- Number of divisors d(n): 240
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Complete list of divisors:
1 2 4 7 8 11 14 16 22 23 28 32 44 46 56 64 73 77 88 92 112 121 128 146 154 161 176 184 224 242 253 256 292 308 322 352 368 448 484 506 511 512 584 616 644 704 736 803 847 896 968 1012 1022 1168 1232 1288 1408 1472 1606 1679 1694 1771 1792 1936 2024 2044 2336 2464 2576 2783 2816 2944 3212 3358 3388 3542 3584 3872 4048 4088 4672 4928 5152 5566 5621 5632 5888 6424 6716 6776 7084 7744 8096 8176 8833 9344 9856 10304 11132 11242 11753 11776 12848 13432 13552 14168 15488 16192 16352 17666 18469 18688 19481 19712 20608 22264 22484 23506 25696 26864 27104 28336 30976 32384 32704 35332 36938 37376 38962 39424 41216 44528 44968 47012 51392 53728 54208 56672 61831 61952 64768 65408 70664 73876 77924 82432 89056 89936 94024 102784 107456 108416 113344 123662 129283 129536 130816 141328 147752 155848 178112 179872 188048 203159 205568 214912 216832 226688 247324 258566 261632 282656 295504 311696 356224 359744 376096 406318 411136 429824 433664 453376 494648 517132 565312 591008 623392 712448 719488 752192 812636 859648 906752 989296 1034264 1130624 1182016 1246784 1422113 1424896 1438976 1504384 1625272 1978592 2068528 2261248 2364032 2493568 2844226 2877952 3008768 3250544 3957184 4137056 4522496 4728064 4987136 5688452 6017536 6501088 7914368 8274112 9456128 9974272 11376904 13002176 15828736 16548224 22753808 26004352 31657472 33096448 45507616 52008704 66192896 91015232 104017408 182030464 364060928 728121856
- Sum of all divisors σ(n): 1933126272
- Sum of proper divisors (its aliquot sum) s(n): 1205004416
- 728121856 is an abundant number, because the sum of its proper divisors (1205004416) is greater than itself. Its abundance is 476882560
Bases of 728121856
- Binary: 1010110110011001000010000000002
- Hexadecimal: 0x2B664200
- Base-36: C1I6F4
Squares and roots of 728121856
- 728121856 squared (7281218562) is 530161437184884736
- 728121856 cubed (7281218563) is 386022129622685689122390016
-
The
square root of 728121856 is 26983.7331738957 -
The
cube root of 728121856 is 899.6384786681
Scales and comparisons
How big is 728121856?- 728,121,856 seconds is equal to 23 years, 7 weeks, 6 days, 8 hours, 4 minutes, 16 seconds.
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To count from 1 to 728,121,856 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 728121856 cubic inches would be around 75 feet tall.
Recreational maths with 728121856
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