28717920
28,717,920 is an even composite number composed of six prime numbers multiplied together.
28717920 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of four hundred thirty-two divisors.
Prime factorization of 28717920:
25 × 32 × 5 × 72 × 11 × 37
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 7 × 7 × 11 × 37)See below for interesting mathematical facts about the number 28717920 from the Numbermatics database.
Names of 28717920
- Cardinal: 28717920 can be written as Twenty-eight million, seven hundred seventeen thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.871792 × 107
Factors of 28717920
Divisors of 28717920
- Number of divisors d(n): 432
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Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 18 20 21 22 24 28 30 32 33 35 36 37 40 42 44 45 48 49 55 56 60 63 66 70 72 74 77 80 84 88 90 96 98 99 105 110 111 112 120 126 132 140 144 147 148 154 160 165 168 176 180 185 196 198 210 220 222 224 231 240 245 252 259 264 280 288 294 296 308 315 330 333 336 352 360 370 385 392 396 407 420 440 441 444 462 480 490 495 504 518 528 539 555 560 588 592 616 630 660 666 672 693 720 735 740 770 777 784 792 814 840 880 882 888 924 980 990 1008 1036 1056 1078 1110 1120 1155 1176 1184 1221 1232 1260 1295 1320 1332 1386 1440 1470 1480 1540 1554 1568 1584 1617 1628 1665 1680 1760 1764 1776 1813 1848 1960 1980 2016 2035 2072 2156 2205 2220 2310 2331 2352 2442 2464 2520 2590 2640 2664 2695 2772 2849 2940 2960 3080 3108 3168 3234 3256 3330 3360 3465 3528 3552 3626 3663 3696 3885 3920 3960 4070 4144 4312 4410 4440 4620 4662 4704 4851 4884 5040 5180 5280 5328 5390 5439 5544 5698 5880 5920 6105 6160 6216 6468 6512 6660 6930 7056 7252 7326 7392 7770 7840 7920 8085 8140 8288 8547 8624 8820 8880 9065 9240 9324 9702 9768 10080 10360 10656 10780 10878 11088 11396 11655 11760 12210 12320 12432 12936 13024 13320 13860 14112 14245 14504 14652 15540 15840 16170 16280 16317 17094 17248 17640 17760 18130 18315 18480 18648 19404 19536 19943 20720 21560 21756 22176 22792 23310 23520 24255 24420 24864 25641 25872 26640 27195 27720 28490 29008 29304 31080 32340 32560 32634 34188 35280 36260 36630 36960 37296 38808 39072 39886 41440 42735 43120 43512 45584 46620 48510 48840 51282 51744 53280 54390 55440 56980 58016 58608 59829 62160 64680 65120 65268 68376 70560 72520 73260 74592 77616 79772 81585 85470 86240 87024 91168 93240 97020 97680 99715 102564 108780 110880 113960 117216 119658 124320 128205 129360 130536 136752 145040 146520 155232 159544 163170 170940 174048 179487 186480 194040 195360 199430 205128 217560 227920 239316 256410 258720 261072 273504 290080 293040 299145 319088 326340 341880 358974 372960 388080 398860 410256 435120 455840 478632 512820 522144 586080 598290 638176 652680 683760 717948 776160 797720 820512 870240 897435 957264 1025640 1196580 1305360 1367520 1435896 1595440 1794870 1914528 2051280 2393160 2610720 2871792 3190880 3589740 4102560 4786320 5743584 7179480 9572640 14358960 28717920
- Sum of all divisors σ(n): 127724688
- Sum of proper divisors (its aliquot sum) s(n): 99006768
- 28717920 is an abundant number, because the sum of its proper divisors (99006768) is greater than itself. Its abundance is 70288848
Bases of 28717920
- Binary: 11011011000110011011000002
- Hexadecimal: 0x1B63360
- Base-36: H3IW0
Squares and roots of 28717920
- 28717920 squared (287179202) is 824718929126400
- 28717920 cubed (287179203) is 23684212229137625088000
-
The
square root of 28717920 is 5358.9103369995 -
The
cube root of 28717920 is 306.2322982965
Scales and comparisons
How big is 28717920?- 28,717,920 seconds is equal to 47 weeks, 3 days, 9 hours, 12 minutes.
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To count from 1 to 28,717,920 would take you about nineteen 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 28717920 cubic inches would be around 25.5 feet tall.
Recreational maths with 28717920
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