640249

Names of 640249

• Cardinal: 640249 can be written as Six hundred forty thousand, two hundred forty-nine.

Scientific notation

• Scientific notation: 6.40249 × 10⁵

Factors of 640249

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 640249

Divisors of 640249

• Number of divisors d(n): 2
• Complete list of divisors:
  1 640249
• Sum of all divisors σ(n): 640250
• Sum of proper divisors (its aliquot sum) s(n): 1
• 640249 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 640248

Bases of 640249

• Binary: 10011100010011111001₂
• Hexadecimal: 0x9C4F9
• Base-36: DQ0P

Squares and roots of 640249

• 640249 squared (640249²) is 409918782001
• 640249 cubed (640249³) is 262450090257358249
• The square root of 640249 is 800.1556098659
• The cube root of 640249 is 86.1885622821

Scales and comparisons

• 640,249 seconds is equal to 1 week, 9 hours, 50 minutes, 49 seconds.
• To count from 1 to 640,249 would take you about nine hours!

  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 640249 cubic inches would be around 7.2 feet tall.

Recreational maths with 640249

• 640249 backwards is 942046
• The number of decimal digits it has is: 6
• The sum of 640249's digits is 25
• More coming soon!