328932309 has 4 divisors (see below), whose sum is σ = 438576416. Its totient is φ = 219288204.

The previous prime is 328932301. The next prime is 328932311. The reversal of 328932309 is 903239823.

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, and also an emirpimes, since its reverse is a distinct semiprime: 903239823 = 3 ⋅301079941.

It is not a de Polignac number, because 328932309 - 2³ = 328932301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328932301) 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 3 ways as a sum of consecutive naturals, for example, 54822049 + ... + 54822054.

It is an arithmetic number, because the mean of its divisors is an integer number (109644104).

Almost surely, 2^328932309 is an apocalyptic number.

It is an amenable number.

328932309 is a deficient number, since it is larger than the sum of its proper divisors (109644107).

328932309 is a wasteful number, since it uses less digits than its factorization.

328932309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109644106.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 328932309 is about 18136.4910884107. The cubic root of 328932309 is about 690.2962454022.

The spelling of 328932309 in words is "three hundred twenty-eight million, nine hundred thirty-two thousand, three hundred nine".