18194028 has 24 divisors (see below), whose sum is σ = 42522480. Its totient is φ = 6054720.

The previous prime is 18194027. The next prime is 18194041. The reversal of 18194028 is 82049181.

It is a self number, because there is not a number n which added to its sum of digits gives 18194028.

It is not an unprimeable number, because it can be changed into a prime (18194021) 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, 12018 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (1771770).

Almost surely, 2^18194028 is an apocalyptic number.

It is an amenable number.

18194028 is an abundant number, since it is smaller than the sum of its proper divisors (24328452).

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

18194028 is a wasteful number, since it uses less digits than its factorization.

18194028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18194028 is about 4265.4458149178. The cubic root of 18194028 is about 263.0124375464.

The spelling of 18194028 in words is "eighteen million, one hundred ninety-four thousand, twenty-eight".