640395904398

Names of 640395904398

• Cardinal: 640395904398 can be written as Six hundred forty billion, three hundred ninety-five million, nine hundred four thousand, three hundred ninety-eight.

Scientific notation

• Scientific notation: 6.40395904398 × 10¹¹

Factors of 640395904398

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 10057

Divisors of 640395904398

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 83 166 249 311 449 498 622 898 933 1347 1866 2694 9209 18418 25813 27627 37267 51626 55254 74534 77439 111801 139639 154878 223602 279278 418917 764347 837834 1528694 2293041 2863999 4134841 4586082 5727998 8269682 8591997 11590037 12404523 17183994 23180074 24809046 34770111 69540222 237711917 343191803 475423834 686383606 713135751 1029575409 1285935551 1426271502 2059150818 2571871102 3857806653 7715613306 106732650733 213465301466 320197952199 640395904398
• Sum of all divisors σ(n): 1303428672000
• Sum of proper divisors (its aliquot sum) s(n): 663032767602
• 640395904398 is an abundant number, because the sum of its proper divisors (663032767602) is greater than itself. Its abundance is 22636863204

Bases of 640395904398

• Binary: 1001010100011010100100100000010110001110₂
• Hexadecimal: 0x951A92058E
• Base-36: 866Z6QA6

Squares and roots of 640395904398

• 640395904398 squared (640395904398²) is 410106914369732355742404
• 640395904398 cubed (640395904398³) is 262630788327677894112859878298692792
• The square root of 640395904398 is 800247.4019939085
• The cube root of 640395904398 is 8619.5153733585

Scales and comparisons

• 640,395,904,398 seconds is equal to 20,362 years, 31 weeks, 4 days, 15 hours, 13 minutes, 18 seconds.
• To count from 1 to 640,395,904,398 would take you about forty thousand, seven hundred twenty-five 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 640395904398 cubic inches would be around 718.3 feet tall.

Recreational maths with 640395904398

• 640395904398 backwards is 893409593046
• The number of decimal digits it has is: 12
• The sum of 640395904398's digits is 60
• More coming soon!