18030028 has 6 divisors (see below), whose sum is σ = 31552556. Its totient is φ = 9015012.

The previous prime is 18029971. The next prime is 18030041. The reversal of 18030028 is 82003081.

It is a junction number, because it is equal to n+sod(n) for n = 18029990 and 18030008.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253750 + ... + 2253757.

Almost surely, 2^18030028 is an apocalyptic number.

It is an amenable number.

18030028 is a deficient number, since it is larger than the sum of its proper divisors (13522528).

18030028 is a wasteful number, since it uses less digits than its factorization.

18030028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507511 (or 4507509 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18030028 is about 4246.1780461964. The cubic root of 18030028 is about 262.2197910922.

The spelling of 18030028 in words is "eighteen million, thirty thousand, twenty-eight".