18344728 has 16 divisors (see below), whose sum is σ = 36207000. Its totient is φ = 8689536.

The previous prime is 18344723. The next prime is 18344741. The reversal of 18344728 is 82744381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18344723) by changing a digit.

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, 60193 + ... + 60496.

Almost surely, 2^18344728 is an apocalyptic number.

It is an amenable number.

18344728 is a deficient number, since it is larger than the sum of its proper divisors (17862272).

18344728 is a wasteful number, since it uses less digits than its factorization.

18344728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120714 (or 120710 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 18344728 is about 4283.0745965953. The cubic root of 18344728 is about 263.7366136524.

The spelling of 18344728 in words is "eighteen million, three hundred forty-four thousand, seven hundred twenty-eight".