328493839409 has 4 divisors (see below), whose sum is σ = 328499596404. Its totient is φ = 328488082416.

The previous prime is 328493839381. The next prime is 328493839411. The reversal of 328493839409 is 904938394823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904938394823 = 23 ⋅39345147601.

It can be written as a sum of positive squares in 2 ways, for example, as 216134799409 + 112359040000 = 464903^2 + 335200^2 .

It is a cyclic number.

It is not a de Polignac number, because 328493839409 - 2²⁰ = 328492790833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328493839439) 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, 2792042 + ... + 2907315.

It is an arithmetic number, because the mean of its divisors is an integer number (82124899101).

Almost surely, 2^328493839409 is an apocalyptic number.

It is an amenable number.

328493839409 is a deficient number, since it is larger than the sum of its proper divisors (5756995).

328493839409 is an equidigital number, since it uses as much as digits as its factorization.

328493839409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756994.

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 328493839409 in words is "three hundred twenty-eight billion, four hundred ninety-three million, eight hundred thirty-nine thousand, four hundred nine".