328434891 has 4 divisors (see below), whose sum is σ = 437913192. Its totient is φ = 218956592.

The previous prime is 328434881. The next prime is 328434907. The reversal of 328434891 is 198434823.

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

It is a cyclic number.

It is not a de Polignac number, because 328434891 - 2⁵ = 328434859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328434851) 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, 54739146 + ... + 54739151.

It is an arithmetic number, because the mean of its divisors is an integer number (109478298).

Almost surely, 2^328434891 is an apocalyptic number.

328434891 is a deficient number, since it is larger than the sum of its proper divisors (109478301).

328434891 is a wasteful number, since it uses less digits than its factorization.

328434891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109478300.

The product of its digits is 165888, while the sum is 42.

The square root of 328434891 is about 18122.7727183232. The cubic root of 328434891 is about 689.9481099394.

The spelling of 328434891 in words is "three hundred twenty-eight million, four hundred thirty-four thousand, eight hundred ninety-one".