388990728
388,990,728 is an even composite number composed of six prime numbers multiplied together.
388990728 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 388990728:
23 × 33 × 7 × 31 × 43 × 193
(2 × 2 × 2 × 3 × 3 × 3 × 7 × 31 × 43 × 193)See below for interesting mathematical facts about the number 388990728 from the Numbermatics database.
Names of 388990728
- Cardinal: 388990728 can be written as Three hundred eighty-eight million, nine hundred ninety thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 3.88990728 × 108
Factors of 388990728
Divisors of 388990728
- Number of divisors d(n): 256
-
Complete list of divisors:
1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 31 36 42 43 54 56 62 63 72 84 86 93 108 124 126 129 168 172 186 189 193 216 217 248 252 258 279 301 344 372 378 386 387 434 504 516 558 579 602 651 744 756 772 774 837 868 903 1032 1116 1158 1161 1204 1302 1333 1351 1512 1544 1548 1674 1736 1737 1806 1953 2232 2316 2322 2408 2604 2666 2702 2709 3096 3348 3474 3612 3906 3999 4053 4632 4644 5208 5211 5332 5404 5418 5859 5983 6696 6948 7224 7812 7998 8106 8127 8299 9288 9331 10422 10664 10808 10836 11718 11966 11997 12159 13896 15624 15996 16212 16254 16598 17949 18662 20844 21672 23436 23932 23994 24318 24897 27993 31992 32424 32508 33196 35898 35991 36477 37324 41688 41881 46872 47864 47988 48636 49794 53847 55986 58093 65016 66392 71796 71982 72954 74648 74691 83762 83979 95976 97272 99588 107694 111972 116186 125643 143592 143964 145908 149382 161541 167524 167958 174279 199176 215388 223944 224073 232372 251286 251937 257269 287928 291816 298764 323082 335048 335916 348558 376929 430776 448146 464744 502572 503874 514538 522837 597528 646164 671832 697116 753858 771807 896292 1005144 1007748 1029076 1045674 1130787 1292328 1394232 1507716 1543614 1568511 1792584 1800883 2015496 2058152 2091348 2261574 2315421 3015432 3087228 3137022 3601766 4182696 4523148 4630842 5402649 6174456 6274044 6946263 7203532 9046296 9261684 10805298 12548088 13892526 14407064 16207947 18523368 21610596 27785052 32415894 43221192 48623841 55570104 64831788 97247682 129663576 194495364 388990728
- Sum of all divisors σ(n): 1311129600
- Sum of proper divisors (its aliquot sum) s(n): 922138872
- 388990728 is an abundant number, because the sum of its proper divisors (922138872) is greater than itself. Its abundance is 533148144
Bases of 388990728
- Binary: 101110010111110000111000010002
- Hexadecimal: 0x172F8708
- Base-36: 6FLF60
Squares and roots of 388990728
- 388990728 squared (3889907282) is 151313786469969984
- 388990728 cubed (3889907283) is 58859659955390174214308352
-
The
square root of 388990728 is 19722.8478673847 -
The
cube root of 388990728 is 729.9835662779
Scales and comparisons
How big is 388990728?- 388,990,728 seconds is equal to 12 years, 19 weeks, 1 day, 4 hours, 58 minutes, 48 seconds.
-
To count from 1 to 388,990,728 would take you about eighteen 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 388990728 cubic inches would be around 60.8 feet tall.
Recreational maths with 388990728
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