18390

Names of 18390

• Cardinal: 18390 can be written as Eighteen thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.839 × 10⁴

Factors of 18390

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 623

Divisors of 18390

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 5 6 10 15 30 613 1226 1839 3065 3678 6130 9195 18390
• Sum of all divisors σ(n): 44208
• Sum of proper divisors (its aliquot sum) s(n): 25818
• 18390 is an abundant number, because the sum of its proper divisors (25818) is greater than itself. Its abundance is 7428

Bases of 18390

• Binary: 100011111010110₂
• Hexadecimal: 0x47D6
• Base-36: E6U

Squares and roots of 18390

• 18390 squared (18390²) is 338192100
• 18390 cubed (18390³) is 6219352719000
• The square root of 18390 is 135.6097341639
• The cube root of 18390 is 26.3953389383

Scales and comparisons

• 18,390 seconds is equal to 5 hours, 6 minutes, 30 seconds.
• To count from 1 to 18,390 would take you about five hours.

  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 18390 cubic inches would be around 2.2 feet tall.

Recreational maths with 18390

• 18390 backwards is 09381
• The number of decimal digits it has is: 5
• The sum of 18390's digits is 21
• More coming soon!