18449128 has 16 divisors (see below), whose sum is σ = 36096480. Its totient is φ = 8823408.

The previous prime is 18449117. The next prime is 18449129. The reversal of 18449128 is 82194481.

It is not an unprimeable number, because it can be changed into a prime (18449129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49950 + ... + 50317.

It is an arithmetic number, because the mean of its divisors is an integer number (2256030).

Almost surely, 2^18449128 is an apocalyptic number.

It is an amenable number.

18449128 is a deficient number, since it is larger than the sum of its proper divisors (17647352).

18449128 is a wasteful number, since it uses less digits than its factorization.

18449128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100296 (or 100292 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 18449128 is about 4295.2448125805. The cubic root of 18449128 is about 264.2359766431.

The spelling of 18449128 in words is "eighteen million, four hundred forty-nine thousand, one hundred twenty-eight".