164239688 has 36 divisors (see below), whose sum is σ = 323563065. Its totient is φ = 78150688.

The previous prime is 164239687. The next prime is 164239709. The reversal of 164239688 is 886932461.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 105226564 + 59013124 = 10258^2 + 7682^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9062.

It is a super-2 number, since 2×164239688² = 53949350228674688, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164239687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 833606 + ... + 833802.

Almost surely, 2^164239688 is an apocalyptic number.

It is an amenable number.

164239688 is a deficient number, since it is larger than the sum of its proper divisors (159323377).

164239688 is an equidigital number, since it uses as much as digits as its factorization.

164239688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 222 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 164239688 is about 12815.6033022250. The cubic root of 164239688 is about 547.6369004973.

The spelling of 164239688 in words is "one hundred sixty-four million, two hundred thirty-nine thousand, six hundred eighty-eight".