18664990

Names of 18664990

• Cardinal: 18664990 can be written as Eighteen million, six hundred sixty-four thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.866499 × 10⁷

Factors of 18664990

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1866506

Divisors of 18664990

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 5 10 1866499 3732998 9332495 18664990
• Sum of all divisors σ(n): 33597000
• Sum of proper divisors (its aliquot sum) s(n): 14932010
• 18664990 is a deficient number, because the sum of its proper divisors (14932010) is less than itself. Its deficiency is 3732980

Bases of 18664990

• Binary: 1000111001100111000011110₂
• Hexadecimal: 0x11CCE1E
• Base-36: B41ZY

Squares and roots of 18664990

• 18664990 squared (18664990²) is 348381851700100
• 18664990 cubed (18664990³) is 6502543778163849499000
• The square root of 18664990 is 4320.2997581187
• The cube root of 18664990 is 265.2625379641

Scales and comparisons

• 18,664,990 seconds is equal to 30 weeks, 6 days, 43 minutes, 10 seconds.
• To count from 1 to 18,664,990 would take you about forty-six 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 18664990 cubic inches would be around 22.1 feet tall.

Recreational maths with 18664990

• 18664990 backwards is 09946681
• The number of decimal digits it has is: 8
• The sum of 18664990's digits is 43
• More coming soon!