18239828 has 12 divisors (see below), whose sum is σ = 33307680. Its totient is φ = 8723352.

The previous prime is 18239813. The next prime is 18239833. The reversal of 18239828 is 82893281.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 99038 + ... + 99221.

It is an arithmetic number, because the mean of its divisors is an integer number (2775640).

Almost surely, 2^18239828 is an apocalyptic number.

It is an amenable number.

18239828 is a deficient number, since it is larger than the sum of its proper divisors (15067852).

18239828 is a wasteful number, since it uses less digits than its factorization.

18239828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198286 (or 198284 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 18239828 is about 4270.8111641701. The cubic root of 18239828 is about 263.2329471910.

The spelling of 18239828 in words is "eighteen million, two hundred thirty-nine thousand, eight hundred twenty-eight".