328934405 has 4 divisors (see below), whose sum is σ = 394721292. Its totient is φ = 263147520.

The previous prime is 328934401. The next prime is 328934407. The reversal of 328934405 is 504439823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504439823 = 311 ⋅1621993.

It can be written as a sum of positive squares in 2 ways, for example, as 195832036 + 133102369 = 13994^2 + 11537^2 .

It is not a de Polignac number, because 328934405 - 2² = 328934401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328934401) 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, 32893436 + ... + 32893445.

It is an arithmetic number, because the mean of its divisors is an integer number (98680323).

Almost surely, 2^328934405 is an apocalyptic number.

It is an amenable number.

328934405 is a deficient number, since it is larger than the sum of its proper divisors (65786887).

328934405 is an equidigital number, since it uses as much as digits as its factorization.

328934405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65786886.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 328934405 is about 18136.5488723737. The cubic root of 328934405 is about 690.2977116187.

The spelling of 328934405 in words is "three hundred twenty-eight million, nine hundred thirty-four thousand, four hundred five".