40021

Names of 40021

• Cardinal: 40021 can be written as Forty thousand and twenty-one.

Scientific notation

• Scientific notation: 4.0021 × 10⁴

Factors of 40021

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1322

Divisors of 40021

• Number of divisors d(n): 4
• Complete list of divisors:
  1 31 1291 40021
• Sum of all divisors σ(n): 41344
• Sum of proper divisors (its aliquot sum) s(n): 1323
• 40021 is a deficient number, because the sum of its proper divisors (1323) is less than itself. Its deficiency is 38698

Bases of 40021

• Binary: 1001110001010101₂
• Hexadecimal: 0x9C55
• Base-36: UVP

Squares and roots of 40021

• 40021 squared (40021²) is 1601680441
• 40021 cubed (40021³) is 64100852929261
• The square root of 40021 is 200.0524931111
• The cube root of 40021 is 34.2055028021

Scales and comparisons

• 40,021 seconds is equal to 11 hours, 7 minutes, 1 second.
• To count from 1 to 40,021 would take you about eleven 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 40021 cubic inches would be around 2.9 feet tall.

Recreational maths with 40021

• 40021 backwards is 12004
• The number of decimal digits it has is: 5
• The sum of 40021's digits is 7
• More coming soon!