18247028 has 12 divisors (see below), whose sum is σ = 31983840. Its totient is φ = 9108792.

The previous prime is 18247013. The next prime is 18247039. The reversal of 18247028 is 82074281.

It is a junction number, because it is equal to n+sod(n) for n = 18246985 and 18247003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (2665320).

Almost surely, 2^18247028 is an apocalyptic number.

It is an amenable number.

18247028 is a deficient number, since it is larger than the sum of its proper divisors (13736812).

18247028 is a wasteful number, since it uses less digits than its factorization.

18247028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366 (or 7364 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18247028 is about 4271.6540122065. The cubic root of 18247028 is about 263.2675788752.

The spelling of 18247028 in words is "eighteen million, two hundred forty-seven thousand, twenty-eight".