640438189380

Names of 640438189380

• Cardinal: 640438189380 can be written as Six hundred forty billion, four hundred thirty-eight million, one hundred eighty-nine thousand, three hundred eighty.

Scientific notation

• Scientific notation: 6.4043818938 × 10¹¹

Factors of 640438189380

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 107817898

Divisors of 640438189380

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 90 99 108 110 132 135 165 180 198 220 270 297 330 396 495 540 594 660 990 1188 1485 1980 2970 5940 107817877 215635754 323453631 431271508 539089385 646907262 970360893 1078178770 1185996647 1293814524 1617268155 1940721786 2156357540 2371993294 2911082679 3234536310 3557989941 3881443572 4743986588 4851804465 5822165358 5929983235 6469072620 7115979882 9703608930 10673969823 11644330716 11859966470 14231959764 14555413395 17789949705 19407217860 21347939646 23719932940 29110826790 32021909469 35579899410 42695879292 53369849115 58221653580 64043818938 71159798820 106739698230 128087637876 160109547345 213479396460 320219094690 640438189380
• Sum of all divisors σ(n): 2173608420480
• Sum of proper divisors (its aliquot sum) s(n): 1533170231100
• 640438189380 is an abundant number, because the sum of its proper divisors (1533170231100) is greater than itself. Its abundance is 892732041720

Bases of 640438189380

• Binary: 1001010100011101000101110011110101000100₂
• Hexadecimal: 0x951D173D44
• Base-36: 867OD1L0

Squares and roots of 640438189380

• 640438189380 squared (640438189380²) is 410161074416332744784400
• 640438189380 cubed (640438189380³) is 262682815853351583369326774469672000
• The square root of 640438189380 is 800273.8215011159
• The cube root of 640438189380 is 8619.7050831033

Scales and comparisons

• 640,438,189,380 seconds is equal to 20,363 years, 49 weeks, 4 days, 1 hour, 3 minutes.
• To count from 1 to 640,438,189,380 would take you about forty thousand, seven hundred twenty-seven 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 640438189380 cubic inches would be around 718.3 feet tall.

Recreational maths with 640438189380

• 640438189380 backwards is 083981834046
• 640438189380 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640438189380's digits is 54
• More coming soon!