640700550

Names of 640700550

• Cardinal: 640700550 can be written as Six hundred forty million, seven hundred thousand, five hundred fifty.

Scientific notation

• Scientific notation: 6.4070055 × 10⁸

Factors of 640700550

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 617

Divisors of 640700550

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 25 27 30 35 42 45 50 54 63 70 75 90 105 126 135 150 151 175 189 210 225 270 302 315 350 378 449 450 453 525 630 675 755 898 906 945 1050 1057 1347 1350 1359 1510 1575 1890 2114 2245 2265 2694 2718 3143 3150 3171 3775 4041 4077 4490 4530 4725 5285 6286 6342 6735 6795 7550 8082 8154 9429 9450 9513 10570 11225 11325 12123 13470 13590 15715 15855 18858 19026 20205 20385 22450 22650 24246 26425 28287 28539 31430 31710 33675 33975 40410 40770 47145 47565 52850 56574 57078 60615 67350 67799 67950 78575 79275 84861 94290 95130 101025 101925 121230 135598 141435 142695 157150 158550 169722 202050 203397 203850 235725 237825 282870 285390 303075 338995 406794 424305 471450 474593 475650 606150 610191 677990 707175 713475 848610 949186 1016985 1220382 1414350 1423779 1426950 1694975 1830573 2033970 2121525 2372965 2847558 3050955 3389950 3661146 4243050 4271337 4745930 5084925 6101910 7118895 8542674 9152865 10169850 11864825 12814011 14237790 15254775 18305730 21356685 23729650 25628022 30509550 35594475 42713370 45764325 64070055 71188950 91528650 106783425 128140110 213566850 320350275 640700550
• Sum of all divisors σ(n): 2035584000
• Sum of proper divisors (its aliquot sum) s(n): 1394883450
• 640700550 is an abundant number, because the sum of its proper divisors (1394883450) is greater than itself. Its abundance is 754182900

Bases of 640700550

• Binary: 100110001100000101000010000110₂
• Hexadecimal: 0x26305086
• Base-36: ALGFPI

Squares and roots of 640700550

• 640700550 squared (640700550²) is 410497194770302500
• 640700550 cubed (640700550³) is 263005778462789935416375000
• The square root of 640700550 is 25312.0633295667
• The cube root of 640700550 is 862.0881966091

Scales and comparisons

• 640,700,550 seconds is equal to 20 years, 19 weeks, 2 days, 12 hours, 22 minutes, 30 seconds.
• To count from 1 to 640,700,550 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 640700550 cubic inches would be around 71.8 feet tall.

Recreational maths with 640700550

• 640700550 backwards is 055007046
• 640700550 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 640700550's digits is 27
• More coming soon!