328638 has 8 divisors (see below), whose sum is σ = 657288. Its totient is φ = 109544.

The previous prime is 328637. The next prime is 328639. The reversal of 328638 is 836823.

328638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (328637) and next prime (328639).

It is a sphenic number, since it is the product of 3 distinct primes.

328638 is an admirable number.

It is a d-powerful number, because it can be written as 3³ + 2¹⁸ + 6⁶ + 8² + 3⁹ + 8² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328633) 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, 27381 + ... + 27392.

It is an arithmetic number, because the mean of its divisors is an integer number (82161).

2³²⁸⁶³⁸ is an apocalyptic number.

328638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

328638 is a wasteful number, since it uses less digits than its factorization.

328638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54778.

The product of its digits is 6912, while the sum is 30.

The square root of 328638 is about 573.2695700977. The cubic root of 328638 is about 69.0090305341.

The spelling of 328638 in words is "three hundred twenty-eight thousand, six hundred thirty-eight".