324409728 has 64 divisors (see below), whose sum is σ = 867363120. Its totient is φ = 107427840.

The previous prime is 324409703. The next prime is 324409751. The reversal of 324409728 is 827904423.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 57598 + ... + 62978.

Almost surely, 2^324409728 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 324409728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433681560).

324409728 is an abundant number, since it is smaller than the sum of its proper divisors (542953392).

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

324409728 is a wasteful number, since it uses less digits than its factorization.

324409728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555 (or 5543 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 324409728 is about 18011.3777374192. The cubic root of 324409728 is about 687.1179430066.

The spelling of 324409728 in words is "three hundred twenty-four million, four hundred nine thousand, seven hundred twenty-eight".