190806164 has 12 divisors (see below), whose sum is σ = 353552724. Its totient is φ = 89791104.

The previous prime is 190806163. The next prime is 190806191. The reversal of 190806164 is 461608091.

It can be written as a sum of positive squares in 2 ways, for example, as 137077264 + 53728900 = 11708^2 + 7330^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190806163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402919 + ... + 1403054.

It is an arithmetic number, because the mean of its divisors is an integer number (29462727).

Almost surely, 2^190806164 is an apocalyptic number.

It is an amenable number.

190806164 is a deficient number, since it is larger than the sum of its proper divisors (162746560).

190806164 is a wasteful number, since it uses less digits than its factorization.

190806164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805994 (or 2805992 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 190806164 is about 13813.2604406056. The cubic root of 190806164 is about 575.7016402659.

The spelling of 190806164 in words is "one hundred ninety million, eight hundred six thousand, one hundred sixty-four".