64409940

Names of 64409940

• Cardinal: 64409940 can be written as Sixty-four million, four hundred nine thousand, nine hundred forty.

Scientific notation

• Scientific notation: 6.440994 × 10⁷

Factors of 64409940

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 162

Divisors of 64409940

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 17 18 20 21 28 30 31 34 35 36 42 45 51 60 62 63 68 70 84 85 90 93 97 102 105 119 124 126 140 153 155 170 180 186 194 204 210 217 238 252 255 279 291 306 310 315 340 357 372 388 420 434 465 476 485 510 527 558 582 595 612 620 630 651 679 714 765 868 873 930 970 1020 1054 1071 1085 1116 1164 1190 1260 1302 1358 1395 1428 1455 1530 1581 1649 1746 1785 1860 1940 1953 2037 2108 2142 2170 2380 2604 2635 2716 2790 2910 3007 3060 3162 3255 3298 3395 3492 3570 3689 3906 4074 4284 4340 4365 4743 4947 5270 5355 5580 5820 6014 6111 6324 6510 6596 6790 7140 7378 7812 7905 8148 8245 8730 9021 9486 9765 9894 10185 10540 10710 11067 11543 12028 12222 13020 13580 14756 14841 15035 15810 16490 17460 18042 18445 18972 19530 19788 20370 21049 21420 22134 23086 23715 24444 24735 27063 29682 30070 30555 31620 32980 33201 34629 36084 36890 39060 40740 42098 44268 45105 46172 47430 49470 51119 54126 55335 57715 59364 60140 61110 63147 66402 69258 73780 74205 84196 90210 94860 98940 102238 103887 105245 108252 110670 115430 122220 126294 132804 135315 138516 148410 153357 166005 173145 180420 189441 204476 207774 210490 221340 230860 252588 255595 270630 296820 306714 315735 332010 346290 357833 378882 415548 420980 460071 511190 519435 541260 613428 631470 664020 692580 715666 757764 766785 920142 947205 1022380 1038870 1073499 1262940 1431332 1533570 1789165 1840284 1894410 2077740 2146998 2300355 3067140 3220497 3578330 3788820 4293996 4600710 5367495 6440994 7156660 9201420 10734990 12881988 16102485 21469980 32204970 64409940
• Sum of all divisors σ(n): 246564864
• Sum of proper divisors (its aliquot sum) s(n): 182154924
• 64409940 is an abundant number, because the sum of its proper divisors (182154924) is greater than itself. Its abundance is 117744984

Bases of 64409940

• Binary: 11110101101101000101010100₂
• Hexadecimal: 0x3D6D154
• Base-36: 12CJ10

Squares and roots of 64409940

• 64409940 squared (64409940²) is 4148640370803600
• 64409940 cubed (64409940³) is 267213677365037627784000
• The square root of 64409940 is 8025.5803528467
• The cube root of 64409940 is 400.8522246599

Scales and comparisons

• 64,409,940 seconds is equal to 2 years, 2 weeks, 3 days, 11 hours, 39 minutes.
• To count from 1 to 64,409,940 would take you about three 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 64409940 cubic inches would be around 33.4 feet tall.

Recreational maths with 64409940

• 64409940 backwards is 04990446
• 64409940 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 64409940's digits is 36
• More coming soon!