326428329 has 4 divisors (see below), whose sum is σ = 435237776. Its totient is φ = 217618884.

The previous prime is 326428309. The next prime is 326428343. The reversal of 326428329 is 923824623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923824623 = 3 ⋅307941541.

It is not a de Polignac number, because 326428329 - 2⁸ = 326428073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326428309) 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, 54404719 + ... + 54404724.

It is an arithmetic number, because the mean of its divisors is an integer number (108809444).

Almost surely, 2^326428329 is an apocalyptic number.

It is an amenable number.

326428329 is a deficient number, since it is larger than the sum of its proper divisors (108809447).

326428329 is a wasteful number, since it uses less digits than its factorization.

326428329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108809446.

The product of its digits is 124416, while the sum is 39.

The square root of 326428329 is about 18067.3276662599. The cubic root of 326428329 is about 688.5401671282.

The spelling of 326428329 in words is "three hundred twenty-six million, four hundred twenty-eight thousand, three hundred twenty-nine".