328689 has 12 divisors (see below), whose sum is σ = 483600. Its totient is φ = 215064.

The previous prime is 328687. The next prime is 328709. The reversal of 328689 is 986823.

It is not a de Polignac number, because 328689 - 2¹ = 328687 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 328689.

It is not an unprimeable number, because it can be changed into a prime (328687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (40300).

2³²⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

328689 is a deficient number, since it is larger than the sum of its proper divisors (154911).

328689 is a wasteful number, since it uses less digits than its factorization.

328689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 681 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 328689 is about 573.3140500633. The cubic root of 328689 is about 69.0126000934.

It can be divided in two parts, 3286 and 89, that added together give a cube (3375 = 15³).

The spelling of 328689 in words is "three hundred twenty-eight thousand, six hundred eighty-nine".