18128422 has 16 divisors (see below), whose sum is σ = 30295440. Its totient is φ = 8078112.

The previous prime is 18128419. The next prime is 18128441. The reversal of 18128422 is 22482181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11268 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (1893465).

Almost surely, 2^18128422 is an apocalyptic number.

18128422 is a deficient number, since it is larger than the sum of its proper divisors (12167018).

18128422 is a wasteful number, since it uses less digits than its factorization.

18128422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24087.

The product of its digits is 2048, while the sum is 28.

The square root of 18128422 is about 4257.7484660323. The cubic root of 18128422 is about 262.6959238742.

The spelling of 18128422 in words is "eighteen million, one hundred twenty-eight thousand, four hundred twenty-two".