20780

Names of 20780

• Cardinal: 20780 can be written as Twenty thousand, seven hundred eighty.

Scientific notation

• Scientific notation: 2.078 × 10⁴

Factors of 20780

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 1046

Divisors of 20780

• Number of divisors d(n): 12
• Complete list of divisors:
  1 2 4 5 10 20 1039 2078 4156 5195 10390 20780
• Sum of all divisors σ(n): 43680
• Sum of proper divisors (its aliquot sum) s(n): 22900
• 20780 is an abundant number, because the sum of its proper divisors (22900) is greater than itself. Its abundance is 2120

Bases of 20780

• Binary: 101000100101100₂
• Hexadecimal: 0x512C
• Base-36: G18

Squares and roots of 20780

• 20780 squared (20780²) is 431808400
• 20780 cubed (20780³) is 8972978552000
• The square root of 20780 is 144.1526968185
• The cube root of 20780 is 27.4925599707

Scales and comparisons

• 20,780 seconds is equal to 5 hours, 46 minutes, 20 seconds.
• To count from 1 to 20,780 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 20780 cubic inches would be around 2.3 feet tall.

Recreational maths with 20780

• 20780 backwards is 08702
• The number of decimal digits it has is: 5
• The sum of 20780's digits is 17
• More coming soon!