87568764 has 12 divisors (see below), whose sum is σ = 204327144. Its totient is φ = 29189584.

The previous prime is 87568763. The next prime is 87568807. The reversal of 87568764 is 46786578.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87568763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648687 + ... + 3648710.

It is an arithmetic number, because the mean of its divisors is an integer number (17027262).

Almost surely, 2^87568764 is an apocalyptic number.

It is an amenable number.

87568764 is an abundant number, since it is smaller than the sum of its proper divisors (116758380).

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

87568764 is a wasteful number, since it uses less digits than its factorization.

87568764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297404 (or 7297402 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 87568764 is about 9357.8183354882. The cubic root of 87568764 is about 444.0682672402.

The spelling of 87568764 in words is "eighty-seven million, five hundred sixty-eight thousand, seven hundred sixty-four".