328289 has 4 divisors (see below), whose sum is σ = 353556. Its totient is φ = 303024.

The previous prime is 328283. The next prime is 328291. The reversal of 328289 is 982823.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 982823 = 67 ⋅14669.

It can be written as a sum of positive squares in 2 ways, for example, as 193600 + 134689 = 440^2 + 367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328289 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 328289.

It is not an unprimeable number, because it can be changed into a prime (328283) 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, 12614 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (88389).

2³²⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

328289 is a deficient number, since it is larger than the sum of its proper divisors (25267).

328289 is a wasteful number, since it uses less digits than its factorization.

328289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25266.

The product of its digits is 6912, while the sum is 32.

The square root of 328289 is about 572.9650949229. The cubic root of 328289 is about 68.9845936338.

The spelling of 328289 in words is "three hundred twenty-eight thousand, two hundred eighty-nine".