18238828 has 12 divisors (see below), whose sum is σ = 32228560. Its totient is φ = 9030672.

The previous prime is 18238811. The next prime is 18238849. The reversal of 18238828 is 82883281.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21723 + ... + 22546.

Almost surely, 2^18238828 is an apocalyptic number.

It is an amenable number.

18238828 is a deficient number, since it is larger than the sum of its proper divisors (13989732).

18238828 is a wasteful number, since it uses less digits than its factorization.

18238828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44376 (or 44374 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 18238828 is about 4270.6940887870. The cubic root of 18238828 is about 263.2281365140.

The spelling of 18238828 in words is "eighteen million, two hundred thirty-eight thousand, eight hundred twenty-eight".