640564470

Names of 640564470

• Cardinal: 640564470 can be written as Six hundred forty million, five hundred sixty-four thousand, four hundred seventy.

Scientific notation

• Scientific notation: 6.4056447 × 10⁸

Factors of 640564470

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 90

Divisors of 640564470

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 5 6 7 9 10 13 14 15 18 21 26 27 29 30 31 35 39 42 45 54 58 62 63 65 70 78 87 90 91 93 105 117 126 130 135 145 155 174 182 186 189 195 203 210 217 234 261 270 273 279 290 310 315 351 377 378 390 403 406 434 435 455 465 522 546 558 585 609 630 651 702 754 783 806 819 837 841 870 899 910 930 945 1015 1085 1131 1170 1209 1218 1302 1305 1365 1395 1566 1638 1674 1682 1755 1798 1827 1885 1890 1953 2015 2030 2170 2262 2418 2457 2523 2610 2639 2697 2730 2790 2821 3045 3255 3393 3510 3627 3654 3770 3906 3915 4030 4095 4185 4205 4495 4914 5046 5278 5394 5481 5642 5655 5859 5887 6045 6090 6293 6510 6786 7254 7569 7830 7917 8091 8190 8370 8410 8463 8990 9135 9765 10179 10881 10933 10962 11310 11687 11718 11774 12090 12285 12586 12615 13195 13485 14105 15138 15834 16182 16926 16965 17661 18135 18270 18879 19530 20358 21762 21866 22707 23374 23751 24273 24570 25230 25389 26071 26390 26970 27405 28210 29295 29435 31465 32799 33930 35061 35322 36270 37758 37845 39585 40455 42315 45414 47502 48546 50778 50895 52142 52983 54405 54665 54810 56637 58435 58590 58870 62930 65598 70122 71253 75690 76167 76531 78213 79170 80910 81809 84630 88305 94395 98397 101790 105183 105966 108810 109330 113274 113535 116870 118755 121365 126945 130355 142506 152334 153062 156426 158949 163618 163995 169911 175305 176610 182497 188790 196794 210366 227070 229593 234639 237510 242730 245427 253890 260710 264915 283185 295191 315549 317898 327990 338923 339822 350610 356265 364994 380835 382655 391065 409045 459186 469278 490854 491985 525915 529830 547491 566370 590382 631098 677846 688779 703917 712530 736281 761670 765310 782130 794745 818090 849555 912485 983970 1016769 1051830 1094982 1147965 1173195 1227135 1377558 1407834 1472562 1475955 1577745 1589490 1642473 1694615 1699110 1824970 2033538 2066337 2208843 2295930 2346390 2372461 2454270 2737455 2951910 3050307 3155490 3284946 3389230 3443895 3519585 3681405 4132674 4417686 4744922 4927419 5083845 5474910 6100614 6887790 7039170 7117383 7362810 8212365 9150921 9854838 10167690 10331685 11044215 11862305 14234766 15251535 16424730 18301842 20663370 21352149 22088430 23724610 24637095 30503070 35586915 42704298 45754605 49274190 64056447 71173830 91509210 106760745 128112894 213521490 320282235 640564470
• Sum of all divisors σ(n): 2247598080
• Sum of proper divisors (its aliquot sum) s(n): 1607033610
• 640564470 is an abundant number, because the sum of its proper divisors (1607033610) is greater than itself. Its abundance is 966469140

Bases of 640564470

• Binary: 100110001011100011110011110110₂
• Hexadecimal: 0x262E3CF6
• Base-36: ALDIPI

Squares and roots of 640564470

• 640564470 squared (640564470²) is 410322840226380900
• 640564470 cubed (640564470³) is 262838232678506361226623000
• The square root of 640564470 is 25309.3751404495
• The cube root of 640564470 is 862.0271585947

Scales and comparisons

• 640,564,470 seconds is equal to 20 years, 19 weeks, 22 hours, 34 minutes, 30 seconds.
• To count from 1 to 640,564,470 would take you about thirty 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 640564470 cubic inches would be around 71.8 feet tall.

Recreational maths with 640564470

• 640564470 backwards is 074465046
• The number of decimal digits it has is: 9
• The sum of 640564470's digits is 36
• More coming soon!