87138884 has 12 divisors (see below), whose sum is σ = 174277824. Its totient is φ = 37345224.

The previous prime is 87138871. The next prime is 87138901. The reversal of 87138884 is 48883178.

It is a happy number.

87138884 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556024 + ... + 1556079.

It is an arithmetic number, because the mean of its divisors is an integer number (14523152).

Almost surely, 2^87138884 is an apocalyptic number.

It is an amenable number.

87138884 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.

87138884 is a wasteful number, since it uses less digits than its factorization.

87138884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112114 (or 3112112 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 87138884 is about 9334.8210480973. The cubic root of 87138884 is about 443.3404228739.

The spelling of 87138884 in words is "eighty-seven million, one hundred thirty-eight thousand, eight hundred eighty-four".