87044636 has 12 divisors (see below), whose sum is σ = 174089328. Its totient is φ = 37304832.

The previous prime is 87044563. The next prime is 87044663. The reversal of 87044636 is 63644078.

It is a happy number.

87044636 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87044636.

It is a congruent 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, 1554341 + ... + 1554396.

It is an arithmetic number, because the mean of its divisors is an integer number (14507444).

Almost surely, 2^87044636 is an apocalyptic number.

It is an amenable number.

87044636 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.

87044636 is a wasteful number, since it uses less digits than its factorization.

87044636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108748 (or 3108746 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 87044636 is about 9329.7714870194. The cubic root of 87044636 is about 443.1805286163.

The spelling of 87044636 in words is "eighty-seven million, forty-four thousand, six hundred thirty-six".