328944491 has 4 divisors (see below), whose sum is σ = 333577584. Its totient is φ = 324311400.

The previous prime is 328944461. The next prime is 328944523. The reversal of 328944491 is 194449823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194449823 = 9109 ⋅21347.

It is a cyclic number.

It is not a de Polignac number, because 328944491 - 2¹⁴ = 328928107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328944461) 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, 2316440 + ... + 2316581.

It is an arithmetic number, because the mean of its divisors is an integer number (83394396).

Almost surely, 2^328944491 is an apocalyptic number.

328944491 is a deficient number, since it is larger than the sum of its proper divisors (4633093).

328944491 is an equidigital number, since it uses as much as digits as its factorization.

328944491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633092.

The product of its digits is 248832, while the sum is 44.

The square root of 328944491 is about 18136.8269275527. The cubic root of 328944491 is about 690.3047669986.

The spelling of 328944491 in words is "three hundred twenty-eight million, nine hundred forty-four thousand, four hundred ninety-one".