1987

Names of 1987

• Cardinal: 1987 can be written as One thousand, nine hundred eighty-seven.

Scientific notation

• Scientific notation: 1.987 × 10³

Factors of 1987

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1987

Divisors of 1987

• Number of divisors d(n): 2
• Complete list of divisors:
  1 1987
• Sum of all divisors σ(n): 1988
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1987 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1986

Bases of 1987

• Binary: 11111000011₂
• Hexadecimal: 0x7C3
• Base-36: 1J7

Squares and roots of 1987

• 1987 squared (1987²) is 3948169
• 1987 cubed (1987³) is 7845011803
• The square root of 1987 is 44.5757781761
• The cube root of 1987 is 12.5718528487

Scales and comparisons

• 1,987 seconds is equal to 33 minutes, 7 seconds.
• To count from 1 to 1,987 would take you about thirty-three 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 1987 cubic inches would be around 1 feet tall.

Recreational maths with 1987

• 1987 backwards is 7891
• The number of decimal digits it has is: 4
• The sum of 1987's digits is 25
• More coming soon!