28129920
28,129,920 is an even composite number composed of six prime numbers multiplied together.
28129920 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 28129920:
27 × 3 × 5 × 72 × 13 × 23
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 7 × 7 × 13 × 23)See below for interesting mathematical facts about the number 28129920 from the Numbermatics database.
Names of 28129920
- Cardinal: 28129920 can be written as Twenty-eight million, one hundred twenty-nine thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.812992 × 107
Factors of 28129920
Divisors of 28129920
- Number of divisors d(n): 384
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Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 23 24 26 28 30 32 35 39 40 42 46 48 49 52 56 60 64 65 69 70 78 80 84 91 92 96 98 104 105 112 115 120 128 130 138 140 147 156 160 161 168 182 184 192 195 196 208 210 224 230 240 245 260 273 276 280 294 299 312 320 322 336 345 364 368 384 390 392 416 420 448 455 460 480 483 490 520 546 552 560 588 598 624 637 640 644 672 690 728 735 736 780 784 805 832 840 896 897 910 920 960 966 980 1040 1092 1104 1120 1127 1176 1196 1248 1274 1288 1344 1365 1380 1456 1470 1472 1495 1560 1568 1610 1664 1680 1794 1820 1840 1911 1920 1932 1960 2080 2093 2184 2208 2240 2254 2352 2392 2415 2496 2548 2576 2688 2730 2760 2912 2940 2944 2990 3120 3136 3185 3220 3360 3381 3588 3640 3680 3822 3864 3920 4160 4186 4368 4416 4480 4485 4508 4704 4784 4830 4992 5096 5152 5460 5520 5635 5824 5880 5980 6240 6272 6279 6370 6440 6720 6762 7176 7280 7360 7644 7728 7840 8320 8372 8736 8832 8970 9016 9408 9555 9568 9660 10192 10304 10465 10920 11040 11270 11648 11760 11960 12480 12558 12740 12880 13440 13524 14352 14560 14651 14720 15288 15456 15680 16744 16905 17472 17940 18032 18816 19110 19136 19320 20384 20608 20930 21840 22080 22540 23520 23920 24960 25116 25480 25760 27048 28704 29120 29302 30576 30912 31360 31395 33488 33810 34944 35880 36064 38220 38272 38640 40768 41860 43680 43953 44160 45080 47040 47840 50232 50960 51520 54096 57408 58240 58604 61152 61824 62790 66976 67620 71760 72128 73255 76440 77280 81536 83720 87360 87906 90160 94080 95680 100464 101920 103040 108192 114816 117208 122304 125580 133952 135240 143520 144256 146510 152880 154560 167440 174720 175812 180320 191360 200928 203840 216384 219765 234416 244608 251160 267904 270480 287040 293020 305760 309120 334880 351624 360640 401856 407680 432768 439530 468832 502320 540960 574080 586040 611520 669760 703248 721280 803712 879060 937664 1004640 1081920 1172080 1223040 1339520 1406496 1758120 1875328 2009280 2163840 2344160 2812992 3516240 4018560 4688320 5625984 7032480 9376640 14064960 28129920
- Sum of all divisors σ(n): 117210240
- Sum of proper divisors (its aliquot sum) s(n): 89080320
- 28129920 is an abundant number, because the sum of its proper divisors (89080320) is greater than itself. Its abundance is 60950400
Bases of 28129920
- Binary: 11010110100111010100000002
- Hexadecimal: 0x1AD3A80
- Base-36: GQX6O
Squares and roots of 28129920
- 28129920 squared (281299202) is 791292399206400
- 28129920 cubed (281299203) is 22258991886284095488000
-
The
square root of 28129920 is 5303.7647006631 -
The
cube root of 28129920 is 304.1278317425
Scales and comparisons
How big is 28129920?- 28,129,920 seconds is equal to 46 weeks, 3 days, 13 hours, 52 minutes.
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To count from 1 to 28,129,920 would take you about seventeen 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 28129920 cubic inches would be around 25.3 feet tall.
Recreational maths with 28129920
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