18987442

Names of 18987442

• Cardinal: 18987442 can be written as Eighteen million, nine hundred eighty-seven thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 1.8987442 × 10⁷

Factors of 18987442

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 55052

Divisors of 18987442

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 173 346 54877 109754 9493721 18987442
• Sum of all divisors σ(n): 28646316
• Sum of proper divisors (its aliquot sum) s(n): 9658874
• 18987442 is a deficient number, because the sum of its proper divisors (9658874) is less than itself. Its deficiency is 9328568

Bases of 18987442

• Binary: 1001000011011100110110010₂
• Hexadecimal: 0x121B9B2
• Base-36: BAYSY

Squares and roots of 18987442

• 18987442 squared (18987442²) is 360522953703364
• 18987442 cubed (18987442³) is 6845408673111309154888
• The square root of 18987442 is 4357.4582040451
• The cube root of 18987442 is 266.7813628137

Scales and comparisons

• 18,987,442 seconds is equal to 31 weeks, 2 days, 18 hours, 17 minutes, 22 seconds.
• To count from 1 to 18,987,442 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 18987442 cubic inches would be around 22.2 feet tall.

Recreational maths with 18987442

• 18987442 backwards is 24478981
• The number of decimal digits it has is: 8
• The sum of 18987442's digits is 43
• More coming soon!