328240 has 40 divisors (see below), whose sum is σ = 834768. Its totient is φ = 119040.

The previous prime is 328213. The next prime is 328243. The reversal of 328240 is 42823.

It is a happy number.

328240 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (328243) 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 7 ways as a sum of consecutive naturals, for example, 694 + ... + 1066.

2³²⁸²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417384).

328240 is an abundant number, since it is smaller than the sum of its proper divisors (506528).

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

328240 is a wasteful number, since it uses less digits than its factorization.

328240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 328240 is about 572.9223333053. The cubic root of 328240 is about 68.9811612786.

The spelling of 328240 in words is "three hundred twenty-eight thousand, two hundred forty".