328644 has 48 divisors (see below), whose sum is σ = 907200. Its totient is φ = 102528.

The previous prime is 328639. The next prime is 328651. The reversal of 328644 is 446823.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1747 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2³²⁸⁶⁴⁴ is an apocalyptic number.

328644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453600).

328644 is an abundant number, since it is smaller than the sum of its proper divisors (578556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328644 is a wasteful number, since it uses less digits than its factorization.

328644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 201 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 328644 is about 573.2748032140. The cubic root of 328644 is about 69.0094505014.

The spelling of 328644 in words is "three hundred twenty-eight thousand, six hundred forty-four".