18339928 has 8 divisors (see below), whose sum is σ = 34387380. Its totient is φ = 9169960.

The previous prime is 18339913. The next prime is 18340019. The reversal of 18339928 is 82993381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1146238 + ... + 1146253.

Almost surely, 2^18339928 is an apocalyptic number.

It is an amenable number.

18339928 is a deficient number, since it is larger than the sum of its proper divisors (16047452).

18339928 is a wasteful number, since it uses less digits than its factorization.

18339928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292497 (or 2292493 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 18339928 is about 4282.5142148042. The cubic root of 18339928 is about 263.7136089291.

The spelling of 18339928 in words is "eighteen million, three hundred thirty-nine thousand, nine hundred twenty-eight".