328328689 has 4 divisors (see below), whose sum is σ = 353584756. Its totient is φ = 303072624.

The previous prime is 328328677. The next prime is 328328711. The reversal of 328328689 is 986823823.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40449600 + 287879089 = 6360^2 + 16967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328328689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328328659) 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, 12628014 + ... + 12628039.

It is an arithmetic number, because the mean of its divisors is an integer number (88396189).

Almost surely, 2^328328689 is an apocalyptic number.

It is an amenable number.

328328689 is a deficient number, since it is larger than the sum of its proper divisors (25256067).

328328689 is a wasteful number, since it uses less digits than its factorization.

328328689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25256066.

The product of its digits is 995328, while the sum is 49.

The square root of 328328689 is about 18119.8424110145. The cubic root of 328328689 is about 689.8737352100.

The spelling of 328328689 in words is "three hundred twenty-eight million, three hundred twenty-eight thousand, six hundred eighty-nine".