324728 has 8 divisors (see below), whose sum is σ = 608880. Its totient is φ = 162360.

The previous prime is 324707. The next prime is 324733. The reversal of 324728 is 827423.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 324697 and 324706.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 324728.

It is an unprimeable number.

324728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20288 + ... + 20303.

It is an arithmetic number, because the mean of its divisors is an integer number (76110).

2³²⁴⁷²⁸ is an apocalyptic number.

It is an amenable number.

324728 is a deficient number, since it is larger than the sum of its proper divisors (284152).

324728 is a wasteful number, since it uses less digits than its factorization.

324728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40597 (or 40593 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 324728 is about 569.8491028334. The cubic root of 324728 is about 68.7342575526.

The spelling of 324728 in words is "three hundred twenty-four thousand, seven hundred twenty-eight".