13805

Names of 13805

• Cardinal: 13805 can be written as Thirteen thousand, eight hundred five.

Scientific notation

• Scientific notation: 1.3805 × 10⁴

Factors of 13805

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 267

Divisors of 13805

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 11 55 251 1255 2761 13805
• Sum of all divisors σ(n): 18144
• Sum of proper divisors (its aliquot sum) s(n): 4339
• 13805 is a deficient number, because the sum of its proper divisors (4339) is less than itself. Its deficiency is 9466

Bases of 13805

• Binary: 11010111101101₂
• Hexadecimal: 0x35ED
• Base-36: ANH

Squares and roots of 13805

• 13805 squared (13805²) is 190578025
• 13805 cubed (13805³) is 2630929635125
• The square root of 13805 is 117.4946807307
• The cube root of 13805 is 23.9889995885

Scales and comparisons

• 13,805 seconds is equal to 3 hours, 50 minutes, 5 seconds.
• To count from 1 to 13,805 would take you about three 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 13805 cubic inches would be around 2 feet tall.

Recreational maths with 13805

• 13805 backwards is 50831
• The number of decimal digits it has is: 5
• The sum of 13805's digits is 17
• More coming soon!