164642872 has 32 divisors (see below), whose sum is σ = 317116800. Its totient is φ = 80093664.

The previous prime is 164642869. The next prime is 164642893. The reversal of 164642872 is 278246461.

It is a happy number.

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, 104829 + ... + 106387.

It is an arithmetic number, because the mean of its divisors is an integer number (9909900).

Almost surely, 2^164642872 is an apocalyptic number.

It is an amenable number.

164642872 is a deficient number, since it is larger than the sum of its proper divisors (152473928).

164642872 is a wasteful number, since it uses less digits than its factorization.

164642872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915 (or 1911 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 164642872 is about 12831.3238599920. The cubic root of 164642872 is about 548.0846566782.

The spelling of 164642872 in words is "one hundred sixty-four million, six hundred forty-two thousand, eight hundred seventy-two".