• 186 can be written using four 4's:
186 is nontrivially palindromic in base 5 and base 8.
186 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
186 is an admirable number.
186 is an undulating number in base 8.
It is a Curzon number.
It is a plaindrome in base 9, base 11, base 12 and base 13.
It is a nialpdrome in base 6, base 14, base 15 and base 16.
186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
186 is a wasteful number, since it uses less digits than its factorization.
186 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 36.
The square root of 186 is about 13.6381816970. The cubic root of 186 is about 5.7082674734.
Subtracting from 186 its sum of digits (15), we obtain a palindrome (171).
The spelling of 186 in words is "one hundred eighty-six", and thus it is an aban number.