328285 has 4 divisors (see below), whose sum is σ = 393948. Its totient is φ = 262624.

The previous prime is 328283. The next prime is 328291. The reversal of 328285 is 582823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582823 = 109 ⋅5347.

It can be written as a sum of positive squares in 2 ways, for example, as 251001 + 77284 = 501^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 328285 - 2¹ = 328283 is a prime.

It is a Duffinian number.

328285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328283) 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, 32824 + ... + 32833.

It is an arithmetic number, because the mean of its divisors is an integer number (98487).

2³²⁸²⁸⁵ is an apocalyptic number.

It is an amenable number.

328285 is a deficient number, since it is larger than the sum of its proper divisors (65663).

328285 is an equidigital number, since it uses as much as digits as its factorization.

328285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65662.

The product of its digits is 3840, while the sum is 28.

The square root of 328285 is about 572.9616042982. The cubic root of 328285 is about 68.9843134543.

The spelling of 328285 in words is "three hundred twenty-eight thousand, two hundred eighty-five".