12820

Names of 12820

• Cardinal: 12820 can be written as Twelve thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 1.282 × 10⁴

Factors of 12820

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 648

Divisors of 12820

• Number of divisors d(n): 12
• Complete list of divisors:
  1 2 4 5 10 20 641 1282 2564 3205 6410 12820
• Sum of all divisors σ(n): 26964
• Sum of proper divisors (its aliquot sum) s(n): 14144
• 12820 is an abundant number, because the sum of its proper divisors (14144) is greater than itself. Its abundance is 1324

Bases of 12820

• Binary: 11001000010100₂
• Hexadecimal: 0x3214
• Base-36: 9W4

Squares and roots of 12820

• 12820 squared (12820²) is 164352400
• 12820 cubed (12820³) is 2106997768000
• The square root of 12820 is 113.2254388377
• The cube root of 12820 is 23.4043189729

Scales and comparisons

• 12,820 seconds is equal to 3 hours, 33 minutes, 40 seconds.
• To count from 1 to 12,820 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 12820 cubic inches would be around 2 feet tall.

Recreational maths with 12820

• 12820 backwards is 02821
• The number of decimal digits it has is: 5
• The sum of 12820's digits is 13
• More coming soon!