18438974840
18,438,974,840 is an even composite number composed of seven prime numbers multiplied together.
18438974840 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 18438974840:
23 × 5 × 11 × 132 × 19 × 31 × 421
(2 × 2 × 2 × 5 × 11 × 13 × 13 × 19 × 31 × 421)See below for interesting mathematical facts about the number 18438974840 from the Numbermatics database.
Names of 18438974840
- Cardinal: 18438974840 can be written as Eighteen billion, four hundred thirty-eight million, nine hundred seventy-four thousand, eight hundred forty.
Scientific notation
- Scientific notation: 1.843897484 × 1010
Factors of 18438974840
Divisors of 18438974840
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 4 5 8 10 11 13 19 20 22 26 31 38 40 44 52 55 62 65 76 88 95 104 110 124 130 143 152 155 169 190 209 220 247 248 260 286 310 338 341 380 403 418 421 440 494 520 572 589 620 676 682 715 760 806 836 842 845 988 1045 1144 1178 1235 1240 1352 1364 1430 1612 1672 1684 1690 1705 1859 1976 2015 2090 2105 2356 2470 2717 2728 2860 2945 3211 3224 3368 3380 3410 3718 4030 4180 4210 4433 4631 4712 4940 5239 5434 5473 5720 5890 6422 6479 6760 6820 7436 7657 7999 8060 8360 8420 8866 9262 9295 9880 10478 10868 10946 11780 12844 12958 13051 13585 13640 14872 15314 15998 16055 16120 16840 17732 18524 18590 20956 21736 21892 22165 23155 23560 25688 25916 26102 26195 27170 27365 30628 31996 32110 32395 35321 35464 37048 37180 38285 39995 41912 43784 44330 46310 51832 52204 52390 54340 54730 57629 60203 61256 63992 64220 64790 65255 70642 71149 74360 76570 79990 84227 87989 88660 92620 99541 103987 104408 104780 108680 109460 115258 120406 128440 129580 130510 141284 142298 143561 153140 159980 168454 169663 175978 176605 177320 185240 199082 207974 209560 218920 230516 240812 247969 259160 261020 282568 284596 287122 288145 301015 306280 319960 336908 339326 351956 353210 355745 398164 415948 421135 439945 461032 481624 495938 497705 519935 522040 569192 574244 576290 602030 673816 678652 703912 706420 711490 717805 782639 796328 831896 842270 848315 879890 991876 995410 1039870 1094951 1143857 1148488 1152580 1204060 1239845 1351831 1357304 1412840 1422980 1435610 1565278 1684540 1696630 1759780 1866293 1983752 1990820 2079740 2189902 2205619 2287714 2305160 2408120 2479690 2703662 2727659 2845960 2871220 3130556 3223597 3369080 3393260 3519560 3732586 3913195 3981640 4159480 4379804 4411238 4575428 4959380 5407324 5455318 5474755 5719285 5742440 6261112 6447194 6759155 6786520 7465172 7826390 8759608 8822476 9150856 9331465 9918760 10814648 10910636 10949510 11028095 11438570 12894388 13518310 13638295 14870141 14930344 15652780 16117985 17644952 18662930 21821272 21899020 22056190 22877140 24261809 25788776 27036620 27276590 29740282 31305560 32235970 35459567 37325860 41906761 43798040 44112380 45754280 48523618 54073240 54553180 59480564 64471940 70919134 74350705 74651720 83813522 88224760 97047236 109106360 118961128 121309045 128943880 141838268 148701410 167627044 177297835 194094472 209533805 242618090 283676536 297402820 335254088 354595670 419067610 460974371 485236180 594805640 709191340 838135220 921948742 970472360 1418382680 1676270440 1843897484 2304871855 3687794968 4609743710 9219487420 18438974840
- Sum of all divisors σ(n): 53378611200
- Sum of proper divisors (its aliquot sum) s(n): 34939636360
- 18438974840 is an abundant number, because the sum of its proper divisors (34939636360) is greater than itself. Its abundance is 16500661520
Bases of 18438974840
- Binary: 100010010110000110001101101011110002
- Hexadecimal: 0x44B0C6D78
- Base-36: 8GY381K
Squares and roots of 18438974840
- 18438974840 squared (184389748402) is 339995793150153025600
- 18438974840 cubed (184389748403) is 6269173875601515981188275904000
-
The
square root of 18438974840 is 135790.1868324807 -
The
cube root of 18438974840 is 2641.8749517471
Scales and comparisons
How big is 18438974840?- 18,438,974,840 seconds is equal to 586 years, 15 weeks, 5 days, 1 hour, 27 minutes, 20 seconds.
-
To count from 1 to 18,438,974,840 would take you about one thousand, one hundred seventy-two 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 18438974840 cubic inches would be around 220.2 feet tall.
Recreational maths with 18438974840
- 18438974840 backwards is 04847983481
- The number of decimal digits it has is: 11
- The sum of 18438974840's digits is 56
- More coming soon!
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