324723728 has 80 divisors (see below), whose sum is σ = 738226560. Its totient is φ = 135502848.

The previous prime is 324723719. The next prime is 324723761. The reversal of 324723728 is 827327423.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 324723691 and 324723700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037300 + ... + 1037612.

It is an arithmetic number, because the mean of its divisors is an integer number (9227832).

Almost surely, 2^324723728 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 324723728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369113280).

324723728 is an abundant number, since it is smaller than the sum of its proper divisors (413502832).

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

324723728 is a wasteful number, since it uses less digits than its factorization.

324723728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 538 counting only the distinct ones).

The product of its digits is 112896, while the sum is 38.

The square root of 324723728 is about 18020.0923416058. The cubic root of 324723728 is about 687.3395613720.

The spelling of 324723728 in words is "three hundred twenty-four million, seven hundred twenty-three thousand, seven hundred twenty-eight".