87198664 has 16 divisors (see below), whose sum is σ = 186854400. Its totient is φ = 37370832.

The previous prime is 87198649. The next prime is 87198673. The reversal of 87198664 is 46689178.

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, 778504 + ... + 778615.

It is an arithmetic number, because the mean of its divisors is an integer number (11678400).

Almost surely, 2^87198664 is an apocalyptic number.

It is an amenable number.

87198664 is an abundant number, since it is smaller than the sum of its proper divisors (99655736).

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

87198664 is a wasteful number, since it uses less digits than its factorization.

87198664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557132 (or 1557128 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 87198664 is about 9338.0224887285. The cubic root of 87198664 is about 443.4417814981.

The spelling of 87198664 in words is "eighty-seven million, one hundred ninety-eight thousand, six hundred sixty-four".