640550430

Names of 640550430

• Cardinal: 640550430 can be written as Six hundred forty million, five hundred fifty thousand, four hundred thirty.

Scientific notation

• Scientific notation: 6.4055043 × 10⁸

Factors of 640550430

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 774

Divisors of 640550430

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 27 30 39 45 54 65 78 81 90 117 130 135 162 195 234 243 270 351 390 405 486 585 702 729 751 810 1053 1170 1215 1458 1502 1755 2106 2187 2253 2430 3159 3510 3645 3755 4374 4506 5265 6318 6561 6759 7290 7510 9477 9763 10530 10935 11265 13122 13518 15795 18954 19526 20277 21870 22530 28431 29289 31590 32805 33795 40554 47385 48815 56862 58578 60831 65610 67590 85293 87867 94770 97630 101385 121662 142155 146445 170586 175734 182493 202770 263601 284310 292890 304155 364986 426465 439335 527202 547479 608310 790803 852930 878670 912465 1094958 1318005 1581606 1642437 1824930 2372409 2636010 2737395 3284874 3954015 4744818 4927311 5474790 7117227 7908030 8212185 9854622 11862045 14234454 16424370 21351681 23724090 24636555 35586135 42703362 49273110 64055043 71172270 106758405 128110086 213516810 320275215 640550430
• Sum of all divisors σ(n): 1864908864
• Sum of proper divisors (its aliquot sum) s(n): 1224358434
• 640550430 is an abundant number, because the sum of its proper divisors (1224358434) is greater than itself. Its abundance is 583808004

Bases of 640550430

• Binary: 100110001011100000011000011110₂
• Hexadecimal: 0x262E061E
• Base-36: ALD7VI

Squares and roots of 640550430

• 640550430 squared (640550430²) is 410304853373184900
• 640550430 cubed (640550430³) is 262820950259280538164507000
• The square root of 640550430 is 25309.0977713549
• The cube root of 640550430 is 862.0208605299

Scales and comparisons

• 640,550,430 seconds is equal to 20 years, 19 weeks, 18 hours, 40 minutes, 30 seconds.
• To count from 1 to 640,550,430 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 640550430 cubic inches would be around 71.8 feet tall.

Recreational maths with 640550430

• 640550430 backwards is 034055046
• 640550430 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 640550430's digits is 27
• More coming soon!