640650816

Names of 640650816

• Cardinal: 640650816 can be written as Six hundred forty million, six hundred fifty thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 6.40650816 × 10⁸

Factors of 640650816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 116

Divisors of 640650816

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 19 24 26 27 32 36 38 39 48 52 54 57 64 72 76 78 79 96 104 108 114 117 144 152 156 158 171 192 208 216 228 234 237 247 288 304 312 316 342 351 361 416 432 456 468 474 494 513 576 608 624 632 684 702 711 722 741 832 864 912 936 948 988 1026 1027 1083 1216 1248 1264 1368 1404 1422 1444 1482 1501 1728 1824 1872 1896 1976 2052 2054 2133 2166 2223 2496 2528 2736 2808 2844 2888 2964 3002 3081 3249 3648 3744 3792 3952 4104 4108 4266 4332 4446 4503 4693 5056 5472 5616 5688 5776 5928 6004 6162 6498 6669 7488 7584 7904 8208 8216 8532 8664 8892 9006 9243 9386 9747 10944 11232 11376 11552 11856 12008 12324 12996 13338 13509 14079 15168 15808 16416 16432 17064 17328 17784 18012 18486 18772 19494 19513 22464 22752 23104 23712 24016 24648 25992 26676 27018 27729 28158 28519 32832 32864 34128 34656 35568 36024 36972 37544 38988 39026 40527 42237 45504 47424 48032 49296 51984 53352 54036 55458 56316 57038 58539 65728 68256 69312 71136 72048 73944 75088 77976 78052 81054 84474 85557 96064 98592 103968 106704 108072 110916 112632 114076 117078 126711 136512 142272 144096 147888 150176 155952 156104 162108 168948 171114 175617 197184 207936 213408 216144 221832 225264 228152 234156 253422 256671 288192 295776 300352 311904 312208 324216 337896 342228 351234 370747 426816 432288 443664 450528 456304 468312 506844 513342 526851 591552 623808 624416 648432 675792 684456 702468 741494 770013 864576 887328 901056 912608 936624 1013688 1026684 1053702 1112241 1248832 1296864 1351584 1368912 1404936 1482988 1540026 1774656 1825216 1873248 2027376 2053368 2107404 2224482 2593728 2703168 2737824 2809872 2965976 3080052 3336723 3746496 4054752 4106736 4214808 4448964 5475648 5619744 5931952 6160104 6673446 8109504 8213472 8429616 8897928 10010169 11239488 11863904 12320208 13346892 16426944 16859232 17795856 20020338 23727808 24640416 26693784 33718464 35591712 40040676 49280832 53387568 71183424 80081352 106775136 160162704 213550272 320325408 640650816
• Sum of all divisors σ(n): 2167737600
• Sum of proper divisors (its aliquot sum) s(n): 1527086784
• 640650816 is an abundant number, because the sum of its proper divisors (1527086784) is greater than itself. Its abundance is 886435968

Bases of 640650816

• Binary: 100110001011111000111001000000₂
• Hexadecimal: 0x262F8E40
• Base-36: ALFDC0

Squares and roots of 640650816

• 640650816 squared (640650816²) is 410433468041465856
• 640650816 cubed (640650816³) is 262944536214475022482538496
• The square root of 640650816 is 25311.0808935533
• The cube root of 640650816 is 862.0658896703

Scales and comparisons

• 640,650,816 seconds is equal to 20 years, 19 weeks, 1 day, 22 hours, 33 minutes, 36 seconds.
• To count from 1 to 640,650,816 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 640650816 cubic inches would be around 71.8 feet tall.

Recreational maths with 640650816

• 640650816 backwards is 618056046
• 640650816 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 640650816's digits is 36
• More coming soon!