328405423 has 4 divisors (see below), whose sum is σ = 328564720. Its totient is φ = 328246128.

The previous prime is 328405411. The next prime is 328405433. The reversal of 328405423 is 324504823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324504823 = 17 ⋅19088519.

It is a cyclic number.

It is not a de Polignac number, because 328405423 - 2¹⁷ = 328274351 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 (328405433) 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, 76515 + ... + 80692.

It is an arithmetic number, because the mean of its divisors is an integer number (82141180).

Almost surely, 2^328405423 is an apocalyptic number.

328405423 is a deficient number, since it is larger than the sum of its proper divisors (159297).

328405423 is a wasteful number, since it uses less digits than its factorization.

328405423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159296.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 328405423 is about 18121.9596898349. The cubic root of 328405423 is about 689.9274746988.

The spelling of 328405423 in words is "three hundred twenty-eight million, four hundred five thousand, four hundred twenty-three".