640238

Names of 640238

• Cardinal: 640238 can be written as Six hundred forty thousand, two hundred thirty-eight.

Scientific notation

• Scientific notation: 6.40238 × 10⁵

Factors of 640238

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 320121

Divisors of 640238

• Number of divisors d(n): 4
• Complete list of divisors:
  1 2 320119 640238
• Sum of all divisors σ(n): 960360
• Sum of proper divisors (its aliquot sum) s(n): 320122
• 640238 is a deficient number, because the sum of its proper divisors (320122) is less than itself. Its deficiency is 320116

Bases of 640238

• Binary: 10011100010011101110₂
• Hexadecimal: 0x9C4EE
• Base-36: DQ0E

Squares and roots of 640238

• 640238 squared (640238²) is 409904696644
• 640238 cubed (640238³) is 262436563169961272
• The square root of 640238 is 800.1487361735
• The cube root of 640238 is 86.1880686827

Scales and comparisons

• 640,238 seconds is equal to 1 week, 9 hours, 50 minutes, 38 seconds.
• To count from 1 to 640,238 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 640238 cubic inches would be around 7.2 feet tall.

Recreational maths with 640238

• 640238 backwards is 832046
• The number of decimal digits it has is: 6
• The sum of 640238's digits is 23
• More coming soon!