328660689 has 24 divisors (see below), whose sum is σ = 536593440. Its totient is φ = 177920064.

The previous prime is 328660681. The next prime is 328660697. The reversal of 328660689 is 986066823.

It is an interprime number because it is at equal distance from previous prime (328660681) and next prime (328660697).

It is not a de Polignac number, because 328660689 - 2³ = 328660681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328660681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56044 + ... + 61629.

It is an arithmetic number, because the mean of its divisors is an integer number (22358060).

Almost surely, 2^328660689 is an apocalyptic number.

It is an amenable number.

328660689 is a deficient number, since it is larger than the sum of its proper divisors (207932751).

328660689 is a wasteful number, since it uses less digits than its factorization.

328660689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117709 (or 117702 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 328660689 is about 18129.0013238457. The cubic root of 328660689 is about 690.1061861363.

Subtracting from 328660689 its sum of digits (48), we obtain a square (328660641 = 18129²).

The spelling of 328660689 in words is "three hundred twenty-eight million, six hundred sixty thousand, six hundred eighty-nine".