18120928 has 24 divisors (see below), whose sum is σ = 40772592. Its totient is φ = 7766016.

The previous prime is 18120919. The next prime is 18120937. The reversal of 18120928 is 82902181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18120919) and next prime (18120937).

It is a self number, because there is not a number n which added to its sum of digits gives 18120928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40225 + ... + 40672.

It is an arithmetic number, because the mean of its divisors is an integer number (1698858).

Almost surely, 2^18120928 is an apocalyptic number.

It is an amenable number.

18120928 is an abundant number, since it is smaller than the sum of its proper divisors (22651664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18120928 is an equidigital number, since it uses as much as digits as its factorization.

18120928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80914 (or 80906 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18120928 is about 4256.8683324717. The cubic root of 18120928 is about 262.6597207860.

The spelling of 18120928 in words is "eighteen million, one hundred twenty thousand, nine hundred twenty-eight".