3989

Names of 3989

• Cardinal: 3989 can be written as Three thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 3.989 × 10³

Factors of 3989

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 3989

Divisors of 3989

• Number of divisors d(n): 2
• Complete list of divisors:
  1 3989
• Sum of all divisors σ(n): 3990
• Sum of proper divisors (its aliquot sum) s(n): 1
• 3989 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 3988

Bases of 3989

• Binary: 111110010101₂
• Hexadecimal: 0xF95
• Base-36: 32T

Squares and roots of 3989

• 3989 squared (3989²) is 15912121
• 3989 cubed (3989³) is 63473450669
• The square root of 3989 is 63.1585306985
• The cube root of 3989 is 15.8594459843

Scales and comparisons

• 3,989 seconds is equal to 1 hour, 6 minutes, 29 seconds.
• To count from 1 to 3,989 would take you about six 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 3989 cubic inches would be around 1.3 feet tall.

Recreational maths with 3989

• 3989 backwards is 9893
• The number of decimal digits it has is: 4
• The sum of 3989's digits is 29
• More coming soon!