164435438 has 16 divisors (see below), whose sum is σ = 249540720. Its totient is φ = 81259200.

The previous prime is 164435429. The next prime is 164435477. The reversal of 164435438 is 834534461.

It is a happy number.

It is a super-3 number, since 3×164435438³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123818 + ... + 125138.

It is an arithmetic number, because the mean of its divisors is an integer number (15596295).

Almost surely, 2^164435438 is an apocalyptic number.

164435438 is a deficient number, since it is larger than the sum of its proper divisors (85105282).

164435438 is a wasteful number, since it uses less digits than its factorization.

164435438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its digits is 138240, while the sum is 38.

The square root of 164435438 is about 12823.2382025758. The cubic root of 164435438 is about 547.8543821625.

Adding to 164435438 its reverse (834534461), we get a palindrome (998969899).

The spelling of 164435438 in words is "one hundred sixty-four million, four hundred thirty-five thousand, four hundred thirty-eight".