328505 has 4 divisors (see below), whose sum is σ = 394212. Its totient is φ = 262800.

The previous prime is 328481. The next prime is 328511. The reversal of 328505 is 505823.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 94249 = 484^2 + 307^2 .

It is not a de Polignac number, because 328505 - 2⁸ = 328249 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 328505.

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, 32846 + ... + 32855.

It is an arithmetic number, because the mean of its divisors is an integer number (98553).

2³²⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

328505 is a deficient number, since it is larger than the sum of its proper divisors (65707).

328505 is an equidigital number, since it uses as much as digits as its factorization.

328505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65706.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 328505 is about 573.1535570857. The cubic root of 328505 is about 68.9997199457. Note that the first 3 decimals are identical.

The spelling of 328505 in words is "three hundred twenty-eight thousand, five hundred five".