18490328 has 16 divisors (see below), whose sum is σ = 34853760. Its totient is φ = 9196000.

The previous prime is 18490319. The next prime is 18490391. The reversal of 18490328 is 82309481.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 4523 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (2178360).

Almost surely, 2^18490328 is an apocalyptic number.

It is an amenable number.

18490328 is a deficient number, since it is larger than the sum of its proper divisors (16363432).

18490328 is a wasteful number, since it uses less digits than its factorization.

18490328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12298 (or 12294 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18490328 is about 4300.0381393657. The cubic root of 18490328 is about 264.4325248389.

The spelling of 18490328 in words is "eighteen million, four hundred ninety thousand, three hundred twenty-eight".