1240

Names of 1240

• Cardinal: 1240 can be written as One thousand, two hundred forty.

Scientific notation

• Scientific notation: 1.24 × 10³

Factors of 1240

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 38

Divisors of 1240

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 4 5 8 10 20 31 40 62 124 155 248 310 620 1240
• Sum of all divisors σ(n): 2880
• Sum of proper divisors (its aliquot sum) s(n): 1640
• 1240 is an abundant number, because the sum of its proper divisors (1640) is greater than itself. Its abundance is 400

Bases of 1240

• Binary: 10011011000₂
• Hexadecimal: 0x4D8
• Base-36: YG

Squares and roots of 1240

• 1240 squared (1240²) is 1537600
• 1240 cubed (1240³) is 1906624000
• The square root of 1240 is 35.2136337233
• The cube root of 1240 is 10.7433707099

Scales and comparisons

• 1,240 seconds is equal to 20 minutes, 40 seconds.
• To count from 1 to 1,240 would take you about twenty 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 1240 cubic inches would be around 0.9 feet tall.

Recreational maths with 1240

• 1240 backwards is 0421
• The number of decimal digits it has is: 4
• The sum of 1240's digits is 7
• More coming soon!