42945821

Names of 42945821

• Cardinal: 42945821 can be written as Forty-two million, nine hundred forty-five thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 4.2945821 × 10⁷

Factors of 42945821

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 42945821

Divisors of 42945821

• Number of divisors d(n): 2
• Complete list of divisors:
  1 42945821
• Sum of all divisors σ(n): 42945822
• Sum of proper divisors (its aliquot sum) s(n): 1
• 42945821 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 42945820

Bases of 42945821

• Binary: 10100011110100110100011101₂
• Hexadecimal: 0x28F4D1D
• Base-36: PKH7H

Squares and roots of 42945821

• 42945821 squared (42945821²) is 1844343541364041
• 42945821 cubed (42945821³) is 79206847589926200622661
• The square root of 42945821 is 6553.3061121847
• The cube root of 42945821 is 350.1926041949

Scales and comparisons

• 42,945,821 seconds is equal to 1 year, 19 weeks, 1 hour, 23 minutes, 41 seconds.
• To count from 1 to 42,945,821 would take you about two years!

  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 42945821 cubic inches would be around 29.2 feet tall.

Recreational maths with 42945821

• 42945821 backwards is 12854924
• The number of decimal digits it has is: 8
• The sum of 42945821's digits is 35
• More coming soon!