328840 has 16 divisors (see below), whose sum is σ = 739980. Its totient is φ = 131520.

The previous prime is 328837. The next prime is 328847. The reversal of 328840 is 48823.

328840 = 141² + 142² + ... + 155².

328840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 12996 = 562^2 + 114^2 .

It is not an unprimeable number, because it can be changed into a prime (328847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4071 + ... + 4150.

2³²⁸⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

328840 is an abundant number, since it is smaller than the sum of its proper divisors (411140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328840 is a wasteful number, since it uses less digits than its factorization.

328840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8232 (or 8228 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 328840 is about 573.4457254178. The cubic root of 328840 is about 69.0231666241.

The spelling of 328840 in words is "three hundred twenty-eight thousand, eight hundred forty".