18028396 has 6 divisors (see below), whose sum is σ = 31549700. Its totient is φ = 9014196.

The previous prime is 18028379. The next prime is 18028411. The reversal of 18028396 is 69382081.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253546 + ... + 2253553.

Almost surely, 2^18028396 is an apocalyptic number.

It is an amenable number.

18028396 is a deficient number, since it is larger than the sum of its proper divisors (13521304).

18028396 is a wasteful number, since it uses less digits than its factorization.

18028396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507103 (or 4507101 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18028396 is about 4245.9858690297. The cubic root of 18028396 is about 262.2118791871.

The spelling of 18028396 in words is "eighteen million, twenty-eight thousand, three hundred ninety-six".