28725840
28,725,840 is an even composite number composed of six prime numbers multiplied together.
28725840 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of four hundred divisors.
Prime factorization of 28725840:
24 × 34 × 5 × 11 × 13 × 31
(2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 5 × 11 × 13 × 31)See below for interesting mathematical facts about the number 28725840 from the Numbermatics database.
Names of 28725840
- Cardinal: 28725840 can be written as Twenty-eight million, seven hundred twenty-five thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.872584 × 107
Factors of 28725840
Divisors of 28725840
- Number of divisors d(n): 400
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 11 12 13 15 16 18 20 22 24 26 27 30 31 33 36 39 40 44 45 48 52 54 55 60 62 65 66 72 78 80 81 88 90 93 99 104 108 110 117 120 124 130 132 135 143 144 155 156 162 165 176 180 186 195 198 208 216 220 234 240 248 260 264 270 279 286 297 310 312 324 330 341 351 360 372 390 396 403 405 429 432 440 465 468 495 496 520 528 540 558 572 585 594 620 624 648 660 682 702 715 720 744 780 792 806 810 837 858 880 891 930 936 990 1023 1040 1053 1080 1116 1144 1170 1188 1209 1240 1287 1296 1320 1364 1395 1404 1430 1485 1488 1560 1584 1612 1620 1674 1705 1716 1755 1782 1860 1872 1980 2015 2046 2106 2145 2160 2232 2288 2340 2376 2418 2480 2511 2574 2640 2728 2790 2808 2860 2970 3069 3120 3224 3240 3348 3410 3432 3510 3564 3627 3720 3861 3960 4030 4092 4185 4212 4290 4433 4455 4464 4680 4752 4836 5022 5115 5148 5265 5456 5580 5616 5720 5940 6045 6138 6435 6448 6480 6696 6820 6864 7020 7128 7254 7440 7722 7920 8060 8184 8370 8424 8580 8866 8910 9207 9360 9672 10044 10230 10296 10530 10881 11160 11440 11583 11880 12090 12276 12555 12870 13299 13392 13640 14040 14256 14508 15345 15444 16120 16368 16740 16848 17160 17732 17820 18135 18414 19305 19344 20088 20460 20592 21060 21762 22165 22320 23166 23760 24180 24552 25110 25740 26598 27280 27621 28080 29016 30690 30888 32240 32643 33480 34320 35464 35640 36270 36828 38610 39897 40176 40920 42120 43524 44330 46035 46332 48360 49104 50220 51480 53196 54405 55242 57915 58032 61380 61776 65286 66495 66960 70928 71280 72540 73656 77220 79794 81840 84240 87048 88660 92070 92664 96720 100440 102960 106392 108810 110484 115830 119691 122760 130572 132990 138105 145080 147312 154440 159588 163215 174096 177320 184140 185328 199485 200880 212784 217620 220968 231660 239382 245520 261144 265980 276210 290160 308880 319176 326430 354640 359073 368280 398970 435240 441936 463320 478764 522288 531960 552420 598455 638352 652860 718146 736560 797940 870480 926640 957528 1063920 1104840 1196910 1305720 1436292 1595880 1795365 1915056 2209680 2393820 2611440 2872584 3191760 3590730 4787640 5745168 7181460 9575280 14362920 28725840
- Sum of all divisors σ(n): 120992256
- Sum of proper divisors (its aliquot sum) s(n): 92266416
- 28725840 is an abundant number, because the sum of its proper divisors (92266416) is greater than itself. Its abundance is 63540576
Bases of 28725840
- Binary: 11011011001010010010100002
- Hexadecimal: 0x1B65250
- Base-36: H3P00
Squares and roots of 28725840
- 28725840 squared (287258402) is 825173883705600
- 28725840 cubed (287258403) is 23703812955505672704000
-
The
square root of 28725840 is 5359.6492422545 -
The
cube root of 28725840 is 306.2604472349
Scales and comparisons
How big is 28725840?- 28,725,840 seconds is equal to 47 weeks, 3 days, 11 hours, 24 minutes.
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To count from 1 to 28,725,840 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 28725840 cubic inches would be around 25.5 feet tall.
Recreational maths with 28725840
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Numbermatics. (2024). Number 28725840 - Facts about the integer. Retrieved 15 May 2024, from https://numbermatics.com/n/28725840/
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