328009 has 4 divisors (see below), whose sum is σ = 357840. Its totient is φ = 298180.

The previous prime is 328007. The next prime is 328037. The reversal of 328009 is 900823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 328009 - 2¹ = 328007 is a prime.

It is a Duffinian number.

328009 is a lucky number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (328007) 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, 14899 + ... + 14920.

It is an arithmetic number, because the mean of its divisors is an integer number (89460).

2³²⁸⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

328009 is a deficient number, since it is larger than the sum of its proper divisors (29831).

328009 is a wasteful number, since it uses less digits than its factorization.

328009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29830.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 328009 is about 572.7206998180. The cubic root of 328009 is about 68.9649755733.

The spelling of 328009 in words is "three hundred twenty-eight thousand, nine".