164638 has 8 divisors (see below), whose sum is σ = 248688. Its totient is φ = 81744.

The previous prime is 164627. The next prime is 164653. The reversal of 164638 is 836461.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (31086).

2¹⁶⁴⁶³⁸ is an apocalyptic number.

164638 is a deficient number, since it is larger than the sum of its proper divisors (84050).

164638 is a wasteful number, since it uses less digits than its factorization.

164638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its digits is 3456, while the sum is 28.

The square root of 164638 is about 405.7560843660. The cubic root of 164638 is about 54.8079250442.

It can be divided in two parts, 16463 and 8, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 164638 in words is "one hundred sixty-four thousand, six hundred thirty-eight".