87686520 has 64 divisors (see below), whose sum is σ = 276912000. Its totient is φ = 22151808.

The previous prime is 87686513. The next prime is 87686563. The reversal of 87686520 is 2568678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16950 + ... + 21509.

It is an arithmetic number, because the mean of its divisors is an integer number (4326750).

Almost surely, 2^87686520 is an apocalyptic number.

It is an amenable number.

87686520 is an abundant number, since it is smaller than the sum of its proper divisors (189225480).

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

87686520 is a wasteful number, since it uses less digits than its factorization.

87686520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38492 (or 38488 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 87686520 is about 9364.1080728492. The cubic root of 87686520 is about 444.2672281430.

The spelling of 87686520 in words is "eighty-seven million, six hundred eighty-six thousand, five hundred twenty".