1813

Names of 1813

• Cardinal: 1813 can be written as One thousand, eight hundred thirteen.

Scientific notation

• Scientific notation: 1.813 × 10³

Factors of 1813

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 44

Divisors of 1813

• Number of divisors d(n): 6
• Complete list of divisors:
  1 7 37 49 259 1813
• Sum of all divisors σ(n): 2166
• Sum of proper divisors (its aliquot sum) s(n): 353
• 1813 is a deficient number, because the sum of its proper divisors (353) is less than itself. Its deficiency is 1460

Bases of 1813

• Binary: 11100010101₂
• Hexadecimal: 0x715
• Base-36: 1ED

Squares and roots of 1813

• 1813 squared (1813²) is 3286969
• 1813 cubed (1813³) is 5959274797
• The square root of 1813 is 42.5793377121
• The cube root of 1813 is 12.1936184489

Scales and comparisons

• 1,813 seconds is equal to 30 minutes, 13 seconds.
• To count from 1 to 1,813 would take you about thirty minutes.

  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 1813 cubic inches would be around 1 feet tall.

Recreational maths with 1813

• 1813 backwards is 3181
• The number of decimal digits it has is: 4
• The sum of 1813's digits is 13
• More coming soon!