326638 has 16 divisors (see below), whose sum is σ = 559440. Its totient is φ = 141696.

The previous prime is 326633. The next prime is 326657. The reversal of 326638 is 836623.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3 + 2⁵ + 6⁶ + 6⁷ + 3 + 8 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (34965).

2³²⁶⁶³⁸ is an apocalyptic number.

326638 is a deficient number, since it is larger than the sum of its proper divisors (232802).

326638 is a wasteful number, since it uses less digits than its factorization.

326638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771.

The product of its digits is 5184, while the sum is 28.

The square root of 326638 is about 571.5225279899. The cubic root of 326638 is about 68.8687556303.

It can be divided in two parts, 32 and 6638, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 326638 in words is "three hundred twenty-six thousand, six hundred thirty-eight".