12687618 has 16 divisors (see below), whose sum is σ = 26194176. Its totient is φ = 4092720.

The previous prime is 12687613. The next prime is 12687659. The reversal of 12687618 is 81678621.

It is not an unprimeable number, because it can be changed into a prime (12687613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33921 + ... + 34292.

It is an arithmetic number, because the mean of its divisors is an integer number (1637136).

Almost surely, 2^12687618 is an apocalyptic number.

12687618 is an abundant number, since it is smaller than the sum of its proper divisors (13506558).

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

12687618 is a wasteful number, since it uses less digits than its factorization.

12687618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68249.

The product of its digits is 32256, while the sum is 39.

The square root of 12687618 is about 3561.9682761080. The cubic root of 12687618 is about 233.2348078364.

The spelling of 12687618 in words is "twelve million, six hundred eighty-seven thousand, six hundred eighteen".