323728 has 10 divisors (see below), whose sum is σ = 627254. Its totient is φ = 161856.

The previous prime is 323717. The next prime is 323759. The reversal of 323728 is 827323.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 278784 + 44944 = 528^2 + 212^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101 + ... + 10132.

2³²³⁷²⁸ is an apocalyptic number.

It is an amenable number.

323728 is a deficient number, since it is larger than the sum of its proper divisors (303526).

323728 is a wasteful number, since it uses less digits than its factorization.

323728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20241 (or 20235 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 323728 is about 568.9710010185. The cubic root of 323728 is about 68.6636292788.

The spelling of 323728 in words is "three hundred twenty-three thousand, seven hundred twenty-eight".