187887138 has 32 divisors (see below), whose sum is σ = 392933376. Its totient is φ = 59780688.

The previous prime is 187887121. The next prime is 187887149. The reversal of 187887138 is 831788781.

It is a happy number.

187887138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82645 + ... + 84887.

It is an arithmetic number, because the mean of its divisors is an integer number (12279168).

Almost surely, 2^187887138 is an apocalyptic number.

187887138 is an abundant number, since it is smaller than the sum of its proper divisors (205046238).

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

187887138 is a wasteful number, since it uses less digits than its factorization.

187887138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its digits is 602112, while the sum is 51.

The square root of 187887138 is about 13707.1929292616. The cubic root of 187887138 is about 572.7507725899.

The spelling of 187887138 in words is "one hundred eighty-seven million, eight hundred eighty-seven thousand, one hundred thirty-eight".