190172168 has 8 divisors (see below), whose sum is σ = 356572830. Its totient is φ = 95086080.

The previous prime is 190172167. The next prime is 190172179. The reversal of 190172168 is 861271091.

It can be written as a sum of positive squares in only one way, i.e., 187744804 + 2427364 = 13702^2 + 1558^2 .

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

It is not an unprimeable number, because it can be changed into a prime (190172167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11885753 + ... + 11885768.

Almost surely, 2^190172168 is an apocalyptic number.

It is an amenable number.

190172168 is a deficient number, since it is larger than the sum of its proper divisors (166400662).

190172168 is a wasteful number, since it uses less digits than its factorization.

190172168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23771527 (or 23771523 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 190172168 is about 13790.2925277167. The cubic root of 190172168 is about 575.0633004036.

The spelling of 190172168 in words is "one hundred ninety million, one hundred seventy-two thousand, one hundred sixty-eight".