324736728 has 32 divisors (see below), whose sum is σ = 831645360. Its totient is φ = 105605120.

The previous prime is 324736723. The next prime is 324736781. The reversal of 324736728 is 827637423.

It is a self number, because there is not a number n which added to its sum of digits gives 324736728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324736721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164025 + ... + 165992.

Almost surely, 2^324736728 is an apocalyptic number.

It is an amenable number.

324736728 is an abundant number, since it is smaller than the sum of its proper divisors (506908632).

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

324736728 is a wasteful number, since it uses less digits than its factorization.

324736728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330067 (or 330063 counting only the distinct ones).

The product of its digits is 338688, while the sum is 42.

The square root of 324736728 is about 18020.4530464692. The cubic root of 324736728 is about 687.3487335742.

The spelling of 324736728 in words is "three hundred twenty-four million, seven hundred thirty-six thousand, seven hundred twenty-eight".