328805 has 4 divisors (see below), whose sum is σ = 394572. Its totient is φ = 263040.

The previous prime is 328789. The next prime is 328813. The reversal of 328805 is 508823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508823 = 7 ⋅72689.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 81796 = 497^2 + 286^2 .

It is not a de Polignac number, because 328805 - 2⁴ = 328789 is a prime.

It is a super-2 number, since 2×328805² = 216225456050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32876 + ... + 32885.

It is an arithmetic number, because the mean of its divisors is an integer number (98643).

2³²⁸⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

328805 is a deficient number, since it is larger than the sum of its proper divisors (65767).

328805 is an equidigital number, since it uses as much as digits as its factorization.

328805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65766.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 328805 is about 573.4152073323. The cubic root of 328805 is about 69.0207177163.

The spelling of 328805 in words is "three hundred twenty-eight thousand, eight hundred five".