328641 has 4 divisors (see below), whose sum is σ = 438192. Its totient is φ = 219092.

The previous prime is 328639. The next prime is 328651. The reversal of 328641 is 146823.

It is a happy number.

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 328641 - 2¹ = 328639 is a prime.

It is a D-number.

328641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (328621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54771 + ... + 54776.

It is an arithmetic number, because the mean of its divisors is an integer number (109548).

2³²⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

328641 is a deficient number, since it is larger than the sum of its proper divisors (109551).

328641 is a wasteful number, since it uses less digits than its factorization.

328641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109550.

The product of its digits is 1152, while the sum is 24.

The square root of 328641 is about 573.2721866618. The cubic root of 328641 is about 69.0092405184.

It can be divided in two parts, 328 and 641, that added together give a palindrome (969).

The spelling of 328641 in words is "three hundred twenty-eight thousand, six hundred forty-one".