189

Names of 189

• Cardinal: 189 can be written as One hundred eighty-nine.

Scientific notation

• Scientific notation: 1.89 × 10²

Factors of 189

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 10

Divisors of 189

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 7 9 21 27 63 189
• Sum of all divisors σ(n): 320
• Sum of proper divisors (its aliquot sum) s(n): 131
• 189 is a deficient number, because the sum of its proper divisors (131) is less than itself. Its deficiency is 58

Bases of 189

• Binary: 10111101₂
• Hexadecimal: 0xBD
• Base-36: 59

Squares and roots of 189

• 189 squared (189²) is 35721
• 189 cubed (189³) is 6751269
• The square root of 189 is 13.7477270847
• The cube root of 189 is 5.7387935485

Scales and comparisons

• 189 seconds is equal to 3 minutes, 9 seconds.
• To count from 1 to 189 would take you about thirty-four seconds.

  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 189 cubic inches would be around 0.5 feet tall.

Recreational maths with 189

• 189 backwards is 981
• The number of decimal digits it has is: 3
• The sum of 189's digits is 18
• More coming soon!