87604816 has 20 divisors (see below), whose sum is σ = 182791252. Its totient is φ = 40432896.

The previous prime is 87604807. The next prime is 87604817. The reversal of 87604816 is 61840678.

It can be written as a sum of positive squares in 2 ways, for example, as 20430400 + 67174416 = 4520^2 + 8196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87604817) 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, 210381 + ... + 210796.

Almost surely, 2^87604816 is an apocalyptic number.

It is an amenable number.

87604816 is an abundant number, since it is smaller than the sum of its proper divisors (95186436).

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

87604816 is a wasteful number, since it uses less digits than its factorization.

87604816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421198 (or 421192 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 87604816 is about 9359.7444409556. The cubic root of 87604816 is about 444.1291997459.

The spelling of 87604816 in words is "eighty-seven million, six hundred four thousand, eight hundred sixteen".