640028928

Names of 640028928

• Cardinal: 640028928 can be written as Six hundred forty million, twenty-eight thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 6.40028928 × 10⁸

Factors of 640028928

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 239

Divisors of 640028928

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 7 8 11 12 14 16 21 22 24 28 32 33 42 44 48 56 64 66 77 79 84 88 96 112 128 132 137 154 158 168 176 192 224 231 237 256 264 274 308 316 336 352 384 411 448 462 474 528 548 553 616 632 672 704 768 822 869 896 924 948 959 1056 1096 1106 1232 1264 1344 1408 1507 1644 1659 1738 1792 1848 1896 1918 2112 2192 2212 2464 2528 2607 2688 2816 2877 3014 3288 3318 3476 3696 3792 3836 4224 4384 4424 4521 4928 5056 5214 5376 5754 6028 6083 6576 6636 6952 7392 7584 7672 8448 8768 8848 9042 9856 10112 10428 10549 10823 11508 12056 12166 13152 13272 13904 14784 15168 15344 17536 17696 18084 18249 19712 20224 20856 21098 21646 23016 24112 24332 26304 26544 27808 29568 30336 30688 31647 32469 35072 35392 36168 36498 41712 42196 43292 46032 48224 48664 52608 53088 55616 59136 60672 61376 63294 64938 70784 72336 72996 75761 83424 84392 86584 92064 96448 97328 105216 106176 111232 119053 122752 126588 129876 141568 144672 145992 151522 166848 168784 173168 184128 192896 194656 212352 222464 227283 238106 245504 253176 259752 289344 291984 303044 333696 337568 346336 357159 368256 385792 389312 424704 454566 476212 506352 519504 578688 583968 606088 667392 675136 692672 714318 736512 778624 833371 909132 952424 1012704 1039008 1157376 1167936 1212176 1350272 1385344 1428636 1557248 1666742 1818264 1904848 2025408 2078016 2335872 2424352 2500113 2700544 2770688 2857272 3333484 3636528 3809696 4050816 4156032 4671744 4848704 5000226 5714544 6666968 7273056 7619392 8101632 8312064 9697408 10000452 11429088 13333936 14546112 15238784 19394816 20000904 22858176 26667872 29092224 30477568 40001808 45716352 53335744 58184448 80003616 91432704 106671488 160007232 213342976 320014464 640028928
• Sum of all divisors σ(n): 2166312960
• Sum of proper divisors (its aliquot sum) s(n): 1526284032
• 640028928 is an abundant number, because the sum of its proper divisors (1526284032) is greater than itself. Its abundance is 886255104

Bases of 640028928

• Binary: 100110001001100001000100000000₂
• Hexadecimal: 0x26261100
• Base-36: AL21HC

Squares and roots of 640028928

• 640028928 squared (640028928²) is 409637028676829184
• 640028928 cubed (640028928³) is 262179548333136241074634752
• The square root of 640028928 is 25298.7930146875
• The cube root of 640028928 is 861.7868598767

Scales and comparisons

• 640,028,928 seconds is equal to 20 years, 18 weeks, 1 day, 17 hours, 48 minutes, 48 seconds.
• To count from 1 to 640,028,928 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 640028928 cubic inches would be around 71.8 feet tall.

Recreational maths with 640028928

• 640028928 backwards is 829820046
• The number of decimal digits it has is: 9
• The sum of 640028928's digits is 39
• More coming soon!