186252138 has 48 divisors (see below), whose sum is σ = 411166080. Its totient is φ = 60922368.

The previous prime is 186252109. The next prime is 186252151. The reversal of 186252138 is 831252681.

It is a happy number.

186252138 is a `hidden beast` number, since 1 + 8 + 625 + 21 + 3 + 8 = 666.

186252138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322506 + ... + 323082.

It is an arithmetic number, because the mean of its divisors is an integer number (8565960).

Almost surely, 2^186252138 is an apocalyptic number.

186252138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

186252138 is an abundant number, since it is smaller than the sum of its proper divisors (224913942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

186252138 is a wasteful number, since it uses less digits than its factorization.

186252138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 888 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 186252138 is about 13647.4223939907. The cubic root of 186252138 is about 571.0845647729.

The spelling of 186252138 in words is "one hundred eighty-six million, two hundred fifty-two thousand, one hundred thirty-eight".