18078044 has 24 divisors (see below), whose sum is σ = 33734400. Its totient is φ = 8452080.

The previous prime is 18078043. The next prime is 18078061. The reversal of 18078044 is 44087081.

It is a self number, because there is not a number n which added to its sum of digits gives 18078044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4499 + ... + 7509.

It is an arithmetic number, because the mean of its divisors is an integer number (1405600).

Almost surely, 2^18078044 is an apocalyptic number.

It is an amenable number.

18078044 is a deficient number, since it is larger than the sum of its proper divisors (15656356).

18078044 is a wasteful number, since it uses less digits than its factorization.

18078044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113 (or 3111 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18078044 is about 4251.8283126203. The cubic root of 18078044 is about 262.4523583986.

The spelling of 18078044 in words is "eighteen million, seventy-eight thousand, forty-four".