9805

Names of 9805

• Cardinal: 9805 can be written as Nine thousand, eight hundred five.

Scientific notation

• Scientific notation: 9.805 × 10³

Factors of 9805

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 95

Divisors of 9805

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 37 53 185 265 1961 9805
• Sum of all divisors σ(n): 12312
• Sum of proper divisors (its aliquot sum) s(n): 2507
• 9805 is a deficient number, because the sum of its proper divisors (2507) is less than itself. Its deficiency is 7298

Bases of 9805

• Binary: 10011001001101₂
• Hexadecimal: 0x264D
• Base-36: 7KD

Squares and roots of 9805

• 9805 squared (9805²) is 96138025
• 9805 cubed (9805³) is 942633335125
• The square root of 9805 is 99.0201999595
• The cube root of 9805 is 21.4033884057

Scales and comparisons

• 9,805 seconds is equal to 2 hours, 43 minutes, 25 seconds.
• To count from 1 to 9,805 would take you about two 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 9805 cubic inches would be around 1.8 feet tall.

Recreational maths with 9805

• 9805 backwards is 5089
• The number of decimal digits it has is: 4
• The sum of 9805's digits is 22
• More coming soon!