87438618 has 24 divisors (see below), whose sum is σ = 192280608. Its totient is φ = 28710792.

The previous prime is 87438607. The next prime is 87438619. The reversal of 87438618 is 81683478.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87438619) 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 11 ways as a sum of consecutive naturals, for example, 35046 + ... + 37457.

It is an arithmetic number, because the mean of its divisors is an integer number (8011692).

Almost surely, 2^87438618 is an apocalyptic number.

87438618 is an abundant number, since it is smaller than the sum of its proper divisors (104841990).

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

87438618 is a wasteful number, since it uses less digits than its factorization.

87438618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72578 (or 72575 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 87438618 is about 9350.8618854093. The cubic root of 87438618 is about 443.8481645422.

The spelling of 87438618 in words is "eighty-seven million, four hundred thirty-eight thousand, six hundred eighteen".