328180321 has 4 divisors (see below), whose sum is σ = 375063232. Its totient is φ = 281297412.

The previous prime is 328180313. The next prime is 328180339. The reversal of 328180321 is 123081823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 328180321 - 2³ = 328180313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328180321.

It is not an unprimeable number, because it can be changed into a prime (328180301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23441445 + ... + 23441458.

It is an arithmetic number, because the mean of its divisors is an integer number (93765808).

Almost surely, 2^328180321 is an apocalyptic number.

It is an amenable number.

328180321 is a deficient number, since it is larger than the sum of its proper divisors (46882911).

328180321 is an equidigital number, since it uses as much as digits as its factorization.

328180321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46882910.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 328180321 is about 18115.7478730523. The cubic root of 328180321 is about 689.7698041887.

The spelling of 328180321 in words is "three hundred twenty-eight million, one hundred eighty thousand, three hundred twenty-one".