18249028 has 48 divisors (see below), whose sum is σ = 39029760. Its totient is φ = 7295904.

The previous prime is 18249017. The next prime is 18249031. The reversal of 18249028 is 82094281.

It is a junction number, because it is equal to n+sod(n) for n = 18248984 and 18249002.

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 15 ways as a sum of consecutive naturals, for example, 27363 + ... + 28021.

It is an arithmetic number, because the mean of its divisors is an integer number (813120).

Almost surely, 2^18249028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18249028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19514880).

18249028 is an abundant number, since it is smaller than the sum of its proper divisors (20780732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18249028 is a wasteful number, since it uses less digits than its factorization.

18249028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18249028 is about 4271.8881071489. Note that the first 3 decimals coincide. The cubic root of 18249028 is about 263.2771971707.

The spelling of 18249028 in words is "eighteen million, two hundred forty-nine thousand, twenty-eight".