87204638 has 8 divisors (see below), whose sum is σ = 136494288. Its totient is φ = 41706544.

The previous prime is 87204619. The next prime is 87204659. The reversal of 87204638 is 83640278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×87204638² = 15209297777422088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 947831 + ... + 947922.

It is an arithmetic number, because the mean of its divisors is an integer number (17061786).

Almost surely, 2^87204638 is an apocalyptic number.

87204638 is a deficient number, since it is larger than the sum of its proper divisors (49289650).

87204638 is a wasteful number, since it uses less digits than its factorization.

87204638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895778.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 87204638 is about 9338.3423582561. The cubic root of 87204638 is about 443.4519080321.

The spelling of 87204638 in words is "eighty-seven million, two hundred four thousand, six hundred thirty-eight".