87136686 has 48 divisors (see below), whose sum is σ = 232368864. Its totient is φ = 22980672.

The previous prime is 87136657. The next prime is 87136697. The reversal of 87136686 is 68663178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24961 + ... + 28236.

It is an arithmetic number, because the mean of its divisors is an integer number (4841018).

Almost surely, 2^87136686 is an apocalyptic number.

87136686 is an abundant number, since it is smaller than the sum of its proper divisors (145232178).

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

87136686 is a wasteful number, since it uses less digits than its factorization.

87136686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53225 (or 53222 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 87136686 is about 9334.7033161210. The cubic root of 87136686 is about 443.3366952214.

The spelling of 87136686 in words is "eighty-seven million, one hundred thirty-six thousand, six hundred eighty-six".