87042618 has 48 divisors (see below), whose sum is σ = 215056296. Its totient is φ = 25205760.

The previous prime is 87042617. The next prime is 87042643. The reversal of 87042618 is 81624078.

It can be written as a sum of positive squares in 4 ways, for example, as 43125489 + 43917129 = 6567^2 + 6627^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87042617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6963 + ... + 14918.

Almost surely, 2^87042618 is an apocalyptic number.

87042618 is an abundant number, since it is smaller than the sum of its proper divisors (128013678).

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

87042618 is a wasteful number, since it uses less digits than its factorization.

87042618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21919 (or 21916 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 87042618 is about 9329.6633379774. The cubic root of 87042618 is about 443.1771037634.

The spelling of 87042618 in words is "eighty-seven million, forty-two thousand, six hundred eighteen".