640142

Names of 640142

• Cardinal: 640142 can be written as Six hundred forty thousand, one hundred forty-two.

Scientific notation

• Scientific notation: 6.40142 × 10⁵

Factors of 640142

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1482

Divisors of 640142

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 263 526 1217 2434 320071 640142
• Sum of all divisors σ(n): 964656
• Sum of proper divisors (its aliquot sum) s(n): 324514
• 640142 is a deficient number, because the sum of its proper divisors (324514) is less than itself. Its deficiency is 315628

Bases of 640142

• Binary: 10011100010010001110₂
• Hexadecimal: 0x9C48E
• Base-36: DPXQ

Squares and roots of 640142

• 640142 squared (640142²) is 409781780164
• 640142 cubed (640142³) is 262318528317743288
• The square root of 640142 is 800.0887450777
• The cube root of 640142 is 86.1837606659

Scales and comparisons

• 640,142 seconds is equal to 1 week, 9 hours, 49 minutes, 2 seconds.
• To count from 1 to 640,142 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 640142 cubic inches would be around 7.2 feet tall.

Recreational maths with 640142

• 640142 backwards is 241046
• The number of decimal digits it has is: 6
• The sum of 640142's digits is 17
• More coming soon!