328784 has 10 divisors (see below), whose sum is σ = 637050. Its totient is φ = 164384.

The previous prime is 328781. The next prime is 328787. The reversal of 328784 is 487823.

It is an interprime number because it is at equal distance from previous prime (328781) and next prime (328787).

It can be written as a sum of positive squares in only one way, i.e., 327184 + 1600 = 572^2 + 40^2 .

It is a d-powerful number, because it can be written as 3⁶ + 2⁵ + 7³ + 8⁵ + 8⁵ + 4⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 328784.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 328784.

It is not an unprimeable number, because it can be changed into a prime (328781) 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 as a sum of consecutive naturals, namely, 10259 + ... + 10290.

It is an arithmetic number, because the mean of its divisors is an integer number (63705).

2³²⁸⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

328784 is a deficient number, since it is larger than the sum of its proper divisors (308266).

328784 is a wasteful number, since it uses less digits than its factorization.

328784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20557 (or 20551 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 328784 is about 573.3968957014. The cubic root of 328784 is about 69.0192482882.

The spelling of 328784 in words is "three hundred twenty-eight thousand, seven hundred eighty-four".