40138381

Names of 40138381

• Cardinal: 40138381 can be written as Forty million, one hundred thirty-eight thousand, three hundred eighty-one.

Scientific notation

• Scientific notation: 4.0138381 × 10⁷

Factors of 40138381

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1745170

Divisors of 40138381

• Number of divisors d(n): 4
• Complete list of divisors:
  1 23 1745147 40138381
• Sum of all divisors σ(n): 41883552
• Sum of proper divisors (its aliquot sum) s(n): 1745171
• 40138381 is a deficient number, because the sum of its proper divisors (1745171) is less than itself. Its deficiency is 38393210

Bases of 40138381

• Binary: 10011001000111011010001101₂
• Hexadecimal: 0x264768D
• Base-36: NWAZ1

Squares and roots of 40138381

• 40138381 squared (40138381²) is 1611089629301161
• 40138381 cubed (40138381³) is 64666529366038763960341
• The square root of 40138381 is 6335.4858535079
• The cube root of 40138381 is 342.3891157203

Scales and comparisons

• 40,138,381 seconds is equal to 1 year, 14 weeks, 2 days, 13 hours, 33 minutes, 1 second.
• To count from 1 to 40,138,381 would take you about forty-seven weeks!

  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 40138381 cubic inches would be around 28.5 feet tall.

Recreational maths with 40138381

• 40138381 backwards is 18383104
• The number of decimal digits it has is: 8
• The sum of 40138381's digits is 28
• More coming soon!