12985818 has 16 divisors (see below), whose sum is σ = 26524800. Its totient is φ = 4236416.

The previous prime is 12985801. The next prime is 12985867. The reversal of 12985818 is 81858921.

12985818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12985818.

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, 22743 + ... + 23306.

It is an arithmetic number, because the mean of its divisors is an integer number (1657800).

Almost surely, 2^12985818 is an apocalyptic number.

12985818 is an abundant number, since it is smaller than the sum of its proper divisors (13538982).

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

12985818 is a wasteful number, since it uses less digits than its factorization.

12985818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46101.

The product of its digits is 46080, while the sum is 42.

The square root of 12985818 is about 3603.5840492487. The cubic root of 12985818 is about 235.0479334846.

The spelling of 12985818 in words is "twelve million, nine hundred eighty-five thousand, eight hundred eighteen".