87864538 has 8 divisors (see below), whose sum is σ = 133277940. Its totient is φ = 43438560.

The previous prime is 87864527. The next prime is 87864563. The reversal of 87864538 is 83546878.

It can be written as a sum of positive squares in 2 ways, for example, as 83229129 + 4635409 = 9123^2 + 2153^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 87864491 and 87864500.

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, 246633 + ... + 246988.

Almost surely, 2^87864538 is an apocalyptic number.

87864538 is a deficient number, since it is larger than the sum of its proper divisors (45413402).

87864538 is a wasteful number, since it uses less digits than its factorization.

87864538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493712.

The product of its digits is 1290240, while the sum is 49.

The square root of 87864538 is about 9373.6085900788. The cubic root of 87864538 is about 444.5676700029.

The spelling of 87864538 in words is "eighty-seven million, eight hundred sixty-four thousand, five hundred thirty-eight".