328040 has 32 divisors (see below), whose sum is σ = 756000. Its totient is φ = 128064.

The previous prime is 328037. The next prime is 328043. The reversal of 328040 is 40823.

328040 = 58² + 59² + ... + 105².

It is an interprime number because it is at equal distance from previous prime (328037) and next prime (328043).

It is a super-2 number, since 2×328040² = 215220483200, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 328040.

It is not an unprimeable number, because it can be changed into a prime (328043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2291 + ... + 2429.

It is an arithmetic number, because the mean of its divisors is an integer number (23625).

2³²⁸⁰⁴⁰ 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 328040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378000).

328040 is an abundant number, since it is smaller than the sum of its proper divisors (427960).

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

328040 is a wasteful number, since it uses less digits than its factorization.

328040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 328040 is about 572.7477629812. The cubic root of 328040 is about 68.9671481224.

Adding to 328040 its reverse (40823), we get a palindrome (368863).

The spelling of 328040 in words is "three hundred twenty-eight thousand, forty".