18245728 has 24 divisors (see below), whose sum is σ = 36257760. Its totient is φ = 9037440.

The previous prime is 18245707. The next prime is 18245741. The reversal of 18245728 is 82754281.

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, 873 + ... + 6103.

It is an arithmetic number, because the mean of its divisors is an integer number (1510740).

Almost surely, 2^18245728 is an apocalyptic number.

It is an amenable number.

18245728 is a deficient number, since it is larger than the sum of its proper divisors (18012032).

18245728 is a wasteful number, since it uses less digits than its factorization.

18245728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350 (or 5342 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 18245728 is about 4271.5018436143. The cubic root of 18245728 is about 263.2613266063.

The spelling of 18245728 in words is "eighteen million, two hundred forty-five thousand, seven hundred twenty-eight".