6440868720

Names of 6440868720

• Cardinal: 6440868720 can be written as Six billion, four hundred forty million, eight hundred sixty-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 6.44086872 × 10⁹

Factors of 6440868720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 81

Divisors of 6440868720

• Number of divisors d(n): 600
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 13 15 16 18 20 22 24 26 30 33 36 39 40 44 45 47 48 52 55 60 65 66 72 78 80 88 90 94 99 104 110 117 120 121 130 132 141 143 144 156 165 176 180 188 195 198 208 220 234 235 240 242 260 264 282 286 312 330 360 363 376 390 396 423 429 440 468 470 484 495 517 520 528 564 572 585 605 611 624 660 705 715 720 726 752 780 792 846 858 880 936 940 968 990 1034 1040 1089 1128 1144 1170 1210 1222 1287 1320 1331 1410 1430 1452 1551 1560 1573 1584 1692 1716 1815 1833 1872 1880 1936 1980 2068 2115 2145 2178 2256 2288 2340 2420 2444 2574 2585 2640 2662 2820 2860 2904 3055 3102 3120 3146 3384 3432 3630 3666 3760 3960 3993 4136 4230 4290 4356 4653 4680 4719 4840 4888 5148 5170 5324 5445 5499 5640 5687 5720 5808 6110 6204 6292 6435 6655 6721 6768 6864 7260 7332 7755 7865 7920 7986 8272 8460 8580 8712 9165 9306 9360 9438 9680 9776 10296 10340 10648 10890 10998 11280 11374 11440 11979 12220 12408 12584 12870 13310 13442 14157 14520 14641 14664 15510 15730 15972 16920 17061 17160 17303 17424 18330 18612 18876 19965 20163 20592 20680 21296 21780 21996 22748 23265 23595 23958 24440 24816 25168 25740 26620 26884 27495 28314 28435 29040 29282 29328 31020 31460 31944 33605 33840 34122 34320 34606 36660 37224 37752 39930 40326 41360 43560 43923 43992 45496 46530 47190 47916 48880 51183 51480 51909 53240 53768 54990 56628 56870 58564 59895 60489 62040 62557 62920 63888 67210 68244 69212 70785 73205 73320 73931 74448 75504 79860 80652 85305 86515 87120 87846 87984 90992 93060 94380 95832 100815 102366 102960 103818 106480 107536 109980 113256 113740 117128 119790 120978 124080 125114 125840 131769 134420 136488 138424 141570 146410 146640 147862 155727 159720 161304 170610 173030 175692 186120 187671 188760 190333 191664 201630 204732 207636 219615 219960 221793 226512 227480 234256 239580 241956 250228 255915 259545 263538 268840 272976 276848 283140 292820 295724 302445 311454 312785 319440 322608 341220 346060 351384 369655 372240 375342 377520 380666 403260 409464 415272 439230 439920 443586 454960 479160 483912 500456 511830 519090 527076 537680 563013 566280 570999 585640 591448 604890 622908 625570 658845 665379 682440 688127 692120 702768 739310 750684 761332 778635 806520 813241 818928 830544 878460 887172 938355 951665 958320 967824 1000912 1023660 1038180 1054152 1108965 1126026 1132560 1141998 1171280 1182896 1209780 1245816 1251140 1317690 1330758 1364880 1376254 1384240 1478620 1501368 1522664 1557270 1613040 1626482 1712997 1756920 1774344 1876710 1903330 2047320 2064381 2076360 2108304 2217930 2252052 2283996 2419560 2439723 2491632 2502280 2635380 2661516 2752508 2815065 2854995 2957240 3002736 3045328 3114540 3252964 3326895 3425994 3440635 3513840 3548688 3753420 3806660 4066205 4094640 4128762 4152720 4435860 4504104 4567992 4839120 4879446 5004560 5270760 5323032 5505016 5630130 5709990 5914480 6193143 6229080 6505928 6653790 6851988 6881270 7319169 7506840 7613320 8132410 8257524 8564985 8871720 8945651 9008208 9135984 9758892 10321905 10541520 10646064 11010032 11260260 11419980 12198615 12386286 12458160 13011856 13307580 13703976 13762540 14638338 15013680 15226640 16264820 16515048 17129970 17743440 17891302 19517784 20643810 22520520 22839960 24397230 24772572 26615160 26836953 27407952 27525080 29276676 30965715 32529640 33030096 34259940 35782604 36595845 39035568 41287620 44728255 45041040 45679920 48794460 49545144 53230320 53673906 55050160 58553352 61931430 65059280 68519880 71565208 73191690 80510859 82575240 89456510 97588920 99090288 107347812 117106704 123862860 134184765 137039760 143130416 146383380 161021718 165150480 178913020 195177840 214695624 247725720 268369530 292766760 322043436 357826040 402554295 429391248 495451440 536739060 585533520 644086872 715652080 805108590 1073478120 1288173744 1610217180 2146956240 3220434360 6440868720
• Sum of all divisors σ(n): 26168950080
• Sum of proper divisors (its aliquot sum) s(n): 19728081360
• 6440868720 is an abundant number, because the sum of its proper divisors (19728081360) is greater than itself. Its abundance is 13287212640

Bases of 6440868720

• Binary: 101111111111001111101101101110000₂
• Hexadecimal: 0x17FE7DB70
• Base-36: 2YIQ640

Squares and roots of 6440868720

• 6440868720 squared (6440868720²) is 41484789868274438400
• 6440868720 cubed (6440868720³) is 267198085418341750666126848000
• The square root of 6440868720 is 80255.0230203693
• The cube root of 6440868720 is 1860.5791467423

Scales and comparisons

• 6,440,868,720 seconds is equal to 204 years, 41 weeks, 4 days, 2 hours, 12 minutes.
• To count from 1 to 6,440,868,720 would take you about four hundred nine 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 6440868720 cubic inches would be around 155 feet tall.

Recreational maths with 6440868720

• 6440868720 backwards is 0278680446
• 6440868720 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 6440868720's digits is 45
• More coming soon!