164438 has 4 divisors (see below), whose sum is σ = 246660. Its totient is φ = 82218.

The previous prime is 164431. The next prime is 164443. The reversal of 164438 is 834461.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×164438³ = 13339139445827016, which contains 333 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 164438.

It is not an unprimeable number, because it can be changed into a prime (164431) 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 as a sum of consecutive naturals, namely, 41108 + ... + 41111.

It is an arithmetic number, because the mean of its divisors is an integer number (61665).

2¹⁶⁴⁴³⁸ is an apocalyptic number.

164438 is a deficient number, since it is larger than the sum of its proper divisors (82222).

164438 is an equidigital number, since it uses as much as digits as its factorization.

164438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82221.

The product of its digits is 2304, while the sum is 26.

The square root of 164438 is about 405.5095559910. The cubic root of 164438 is about 54.7857227445.

Adding to 164438 its reverse (834461), we get a palindrome (998899).

The spelling of 164438 in words is "one hundred sixty-four thousand, four hundred thirty-eight".