164190872 has 8 divisors (see below), whose sum is σ = 307857900. Its totient is φ = 82095432.

The previous prime is 164190869. The next prime is 164190883. The reversal of 164190872 is 278091461.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261922 + ... + 10261937.

Almost surely, 2^164190872 is an apocalyptic number.

It is an amenable number.

164190872 is a deficient number, since it is larger than the sum of its proper divisors (143667028).

164190872 is a wasteful number, since it uses less digits than its factorization.

164190872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20523865 (or 20523861 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 164190872 is about 12813.6986073499. The cubic root of 164190872 is about 547.5826381521.

The spelling of 164190872 in words is "one hundred sixty-four million, one hundred ninety thousand, eight hundred seventy-two".