328223257 has 16 divisors (see below), whose sum is σ = 351543808. Its totient is φ = 305907840.

The previous prime is 328223239. The next prime is 328223261. The reversal of 328223257 is 752322823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328223257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328223297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95623 + ... + 98995.

It is an arithmetic number, because the mean of its divisors is an integer number (21971488).

Almost surely, 2^328223257 is an apocalyptic number.

It is an amenable number.

328223257 is a deficient number, since it is larger than the sum of its proper divisors (23320551).

328223257 is a wasteful number, since it uses less digits than its factorization.

328223257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520.

The product of its digits is 40320, while the sum is 34.

The square root of 328223257 is about 18116.9328805954. The cubic root of 328223257 is about 689.7998838562.

The spelling of 328223257 in words is "three hundred twenty-eight million, two hundred twenty-three thousand, two hundred fifty-seven".