328990 has 16 divisors (see below), whose sum is σ = 598752. Its totient is φ = 130144.

The previous prime is 328981. The next prime is 329009. The reversal of 328990 is 99823.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (37422).

2³²⁸⁹⁹⁰ is an apocalyptic number.

328990 is a deficient number, since it is larger than the sum of its proper divisors (269762).

328990 is a wasteful number, since it uses less digits than its factorization.

328990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 328990 is about 573.5764988212. The cubic root of 328990 is about 69.0336599756.

The spelling of 328990 in words is "three hundred twenty-eight thousand, nine hundred ninety".