186987132 has 72 divisors (see below), whose sum is σ = 499458960. Its totient is φ = 58821120.

The previous prime is 186987077. The next prime is 186987137. The reversal of 186987132 is 231789681.

186987132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186987137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315028 + ... + 315620.

It is an arithmetic number, because the mean of its divisors is an integer number (6936930).

Almost surely, 2^186987132 is an apocalyptic number.

186987132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186987132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249729480).

186987132 is an abundant number, since it is smaller than the sum of its proper divisors (312471828).

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

186987132 is a wasteful number, since it uses less digits than its factorization.

186987132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1078 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 186987132 is about 13674.3238224053. The cubic root of 186987132 is about 571.8347893612.

The spelling of 186987132 in words is "one hundred eighty-six million, nine hundred eighty-seven thousand, one hundred thirty-two".