18624428 has 12 divisors (see below), whose sum is σ = 33644352. Its totient is φ = 9011760.

The previous prime is 18624391. The next prime is 18624449. The reversal of 18624428 is 82442681.

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, 74975 + ... + 75222.

It is an arithmetic number, because the mean of its divisors is an integer number (2803696).

Almost surely, 2^18624428 is an apocalyptic number.

It is an amenable number.

18624428 is a deficient number, since it is larger than the sum of its proper divisors (15019924).

18624428 is a wasteful number, since it uses less digits than its factorization.

18624428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150232 (or 150230 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 18624428 is about 4315.6028547585. The cubic root of 18624428 is about 265.0702460032.

The spelling of 18624428 in words is "eighteen million, six hundred twenty-four thousand, four hundred twenty-eight".