328945 has 4 divisors (see below), whose sum is σ = 394740. Its totient is φ = 263152.

The previous prime is 328931. The next prime is 328961. The reversal of 328945 is 549823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549823 = 487 ⋅1129.

It can be written as a sum of positive squares in 2 ways, for example, as 159201 + 169744 = 399^2 + 412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328945 is a prime.

328945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32890 + ... + 32899.

It is an arithmetic number, because the mean of its divisors is an integer number (98685).

2³²⁸⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

328945 is a deficient number, since it is larger than the sum of its proper divisors (65795).

328945 is an equidigital number, since it uses as much as digits as its factorization.

328945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65794.

The product of its digits is 8640, while the sum is 31.

The square root of 328945 is about 573.5372699311. The cubic root of 328945 is about 69.0305123051.

The spelling of 328945 in words is "three hundred twenty-eight thousand, nine hundred forty-five".