328312445 has 4 divisors (see below), whose sum is σ = 393974940. Its totient is φ = 262649952.

The previous prime is 328312363. The next prime is 328312447. The reversal of 328312445 is 544213823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544213823 = 8719 ⋅62417.

It can be written as a sum of positive squares in 2 ways, for example, as 148913209 + 179399236 = 12203^2 + 13394^2 .

It is a cyclic number.

It is not a de Polignac number, because 328312445 - 2¹² = 328308349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328312447) 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, 32831240 + ... + 32831249.

It is an arithmetic number, because the mean of its divisors is an integer number (98493735).

Almost surely, 2^328312445 is an apocalyptic number.

It is an amenable number.

328312445 is a deficient number, since it is larger than the sum of its proper divisors (65662495).

328312445 is an equidigital number, since it uses as much as digits as its factorization.

328312445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65662494.

The product of its digits is 23040, while the sum is 32.

The square root of 328312445 is about 18119.3941675764. The cubic root of 328312445 is about 689.8623578980.

The spelling of 328312445 in words is "three hundred twenty-eight million, three hundred twelve thousand, four hundred forty-five".