18909442

Names of 18909442

• Cardinal: 18909442 can be written as Eighteen million, nine hundred nine thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 1.8909442 × 10⁷

Factors of 18909442

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 8313

Divisors of 18909442

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 31 37 62 74 1147 2294 8243 16486 255533 304991 511066 609982 9454721 18909442
• Sum of all divisors σ(n): 30074112
• Sum of proper divisors (its aliquot sum) s(n): 11164670
• 18909442 is a deficient number, because the sum of its proper divisors (11164670) is less than itself. Its deficiency is 7744772

Bases of 18909442

• Binary: 1001000001000100100000010₂
• Hexadecimal: 0x1208902
• Base-36: B9AMA

Squares and roots of 18909442

• 18909442 squared (18909442²) is 357566996751364
• 18909442 cubed (18909442³) is 6761392386184105978888
• The square root of 18909442 is 4348.4988214325
• The cube root of 18909442 is 266.4155507551

Scales and comparisons

• 18,909,442 seconds is equal to 31 weeks, 1 day, 20 hours, 37 minutes, 22 seconds.
• To count from 1 to 18,909,442 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 18909442 cubic inches would be around 22.2 feet tall.

Recreational maths with 18909442

• 18909442 backwards is 24490981
• 18909442 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18909442's digits is 37
• More coming soon!