328081 has 4 divisors (see below), whose sum is σ = 353332. Its totient is φ = 302832.

The previous prime is 328067. The next prime is 328093. The reversal of 328081 is 180823.

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 147456 + 180625 = 384^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 328081 - 2⁷ = 327953 is a prime.

It is a super-2 number, since 2×328081² = 215274285122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (328051) 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, 12606 + ... + 12631.

It is an arithmetic number, because the mean of its divisors is an integer number (88333).

2³²⁸⁰⁸¹ is an apocalyptic number.

It is an amenable number.

328081 is a deficient number, since it is larger than the sum of its proper divisors (25251).

328081 is a wasteful number, since it uses less digits than its factorization.

328081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25250.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 328081 is about 572.7835542332. The cubic root of 328081 is about 68.9700212834.

The spelling of 328081 in words is "three hundred twenty-eight thousand, eighty-one".