87491604 has 24 divisors (see below), whose sum is σ = 205619680. Its totient is φ = 28953504.

The previous prime is 87491587. The next prime is 87491611. The reversal of 87491604 is 40619478.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24559 + ... + 27894.

Almost surely, 2^87491604 is an apocalyptic number.

It is an amenable number.

87491604 is an abundant number, since it is smaller than the sum of its proper divisors (118128076).

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

87491604 is a wasteful number, since it uses less digits than its factorization.

87491604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52599 (or 52597 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 87491604 is about 9353.6946710912. The cubic root of 87491604 is about 443.9378007181.

The spelling of 87491604 in words is "eighty-seven million, four hundred ninety-one thousand, six hundred four".