13680618 has 16 divisors (see below), whose sum is σ = 31270080. Its totient is φ = 3908736.

The previous prime is 13680613. The next prime is 13680637. The reversal of 13680618 is 81608631.

It is not an unprimeable number, because it can be changed into a prime (13680613) 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, 162823 + ... + 162906.

It is an arithmetic number, because the mean of its divisors is an integer number (1954380).

Almost surely, 2^13680618 is an apocalyptic number.

13680618 is an abundant number, since it is smaller than the sum of its proper divisors (17589462).

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

13680618 is a wasteful number, since it uses less digits than its factorization.

13680618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325741.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 13680618 is about 3698.7319448698. The cubic root of 13680618 is about 239.1673576744.

The spelling of 13680618 in words is "thirteen million, six hundred eighty thousand, six hundred eighteen".