2840

Names of 2840

• Cardinal: 2840 can be written as Two thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.84 × 10³

Factors of 2840

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 78

Divisors of 2840

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 4 5 8 10 20 40 71 142 284 355 568 710 1420 2840
• Sum of all divisors σ(n): 6480
• Sum of proper divisors (its aliquot sum) s(n): 3640
• 2840 is an abundant number, because the sum of its proper divisors (3640) is greater than itself. Its abundance is 800

Bases of 2840

• Binary: 101100011000₂
• Hexadecimal: 0xB18
• Base-36: 26W

Squares and roots of 2840

• 2840 squared (2840²) is 8065600
• 2840 cubed (2840³) is 22906304000
• The square root of 2840 is 53.2916503779
• The cube root of 2840 is 14.1613975023

Scales and comparisons

• 2,840 seconds is equal to 47 minutes, 20 seconds.
• To count from 1 to 2,840 would take you about forty-seven 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 2840 cubic inches would be around 1.2 feet tall.

Recreational maths with 2840

• 2840 backwards is 0482
• The number of decimal digits it has is: 4
• The sum of 2840's digits is 14
• More coming soon!