13438618 has 16 divisors (see below), whose sum is σ = 20734560. Its totient is φ = 6528816.

The previous prime is 13438609. The next prime is 13438637. The reversal of 13438618 is 81683431.

13438618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26148 + ... + 26656.

It is an arithmetic number, because the mean of its divisors is an integer number (1295910).

Almost surely, 2^13438618 is an apocalyptic number.

13438618 is a deficient number, since it is larger than the sum of its proper divisors (7295942).

13438618 is a wasteful number, since it uses less digits than its factorization.

13438618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its digits is 13824, while the sum is 34.

The square root of 13438618 is about 3665.8720654164. The cubic root of 13438618 is about 237.7487285255.

The spelling of 13438618 in words is "thirteen million, four hundred thirty-eight thousand, six hundred eighteen".