18180642

Names of 18180642

• Cardinal: 18180642 can be written as Eighteen million, one hundred eighty thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 1.8180642 × 10⁷

Factors of 18180642

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3030112

Divisors of 18180642

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 3 6 3030107 6060214 9090321 18180642
• Sum of all divisors σ(n): 36361296
• Sum of proper divisors (its aliquot sum) s(n): 18180654
• 18180642 is an abundant number, because the sum of its proper divisors (18180654) is greater than itself. Its abundance is 12

Bases of 18180642

• Binary: 1000101010110101000100010₂
• Hexadecimal: 0x1156A22
• Base-36: ATO9U

Squares and roots of 18180642

• 18180642 squared (18180642²) is 330535743532164
• 18180642 cubed (18180642³) is 6009352021362089169288
• The square root of 18180642 is 4263.8764053383
• The cube root of 18180642 is 262.9479191547

Scales and comparisons

• 18,180,642 seconds is equal to 30 weeks, 10 hours, 10 minutes, 42 seconds.
• To count from 1 to 18,180,642 would take you about forty-five 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 18180642 cubic inches would be around 21.9 feet tall.

Recreational maths with 18180642

• 18180642 backwards is 24608181
• The number of decimal digits it has is: 8
• The sum of 18180642's digits is 30
• More coming soon!