18449344 has 56 divisors (see below), whose sum is σ = 38404800. Its totient is φ = 8785920.

The previous prime is 18449339. The next prime is 18449357. The reversal of 18449344 is 44394481.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207252 + ... + 207340.

It is an arithmetic number, because the mean of its divisors is an integer number (685800).

Almost surely, 2^18449344 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 18449344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19202400).

18449344 is an abundant number, since it is smaller than the sum of its proper divisors (19955456).

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

18449344 is an equidigital number, since it uses as much as digits as its factorization.

18449344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 211 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 18449344 is about 4295.2699565918. The cubic root of 18449344 is about 264.2370078526.

The spelling of 18449344 in words is "eighteen million, four hundred forty-nine thousand, three hundred forty-four".