989

Names of 989

• Cardinal: 989 can be written as Nine hundred eighty-nine.

Scientific notation

• Scientific notation: 9.89 × 10²

Factors of 989

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 66

Divisors of 989

• Number of divisors d(n): 4
• Complete list of divisors:
  1 23 43 989
• Sum of all divisors σ(n): 1056
• Sum of proper divisors (its aliquot sum) s(n): 67
• 989 is a deficient number, because the sum of its proper divisors (67) is less than itself. Its deficiency is 922

Bases of 989

• Binary: 1111011101₂
• Hexadecimal: 0x3DD
• Base-36: RH

Squares and roots of 989

• 989 squared (989²) is 978121
• 989 cubed (989³) is 967361669
• The square root of 989 is 31.4483703871
• The cube root of 989 is 9.9631980613

Scales and comparisons

• 989 seconds is equal to 16 minutes, 29 seconds.
• To count from 1 to 989 would take you about eight 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 989 cubic inches would be around 0.8 feet tall.

Recreational maths with 989

• 989 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 3
• The sum of 989's digits is 26
• More coming soon!