190394138 has 32 divisors (see below), whose sum is σ = 327559680. Its totient is φ = 82154160.

The previous prime is 190394131. The next prime is 190394167. The reversal of 190394138 is 831493091.

It is a happy number.

190394138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×190394138⁴ (a number of 34 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (190394131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68981 + ... + 71687.

It is an arithmetic number, because the mean of its divisors is an integer number (10236240).

Almost surely, 2^190394138 is an apocalyptic number.

190394138 is a deficient number, since it is larger than the sum of its proper divisors (137165542).

190394138 is a wasteful number, since it uses less digits than its factorization.

190394138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 190394138 is about 13798.3382332801. The cubic root of 190394138 is about 575.2869524254.

The spelling of 190394138 in words is "one hundred ninety million, three hundred ninety-four thousand, one hundred thirty-eight".