188365138 has 8 divisors (see below), whose sum is σ = 304282188. Its totient is φ = 86937744.

The previous prime is 188365129. The next prime is 188365141. The reversal of 188365138 is 831563881.

188365138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139546969 + 48818169 = 11813^2 + 6987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 188365094 and 188365103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622381 + ... + 3622432.

Almost surely, 2^188365138 is an apocalyptic number.

188365138 is a deficient number, since it is larger than the sum of its proper divisors (115917050).

188365138 is a wasteful number, since it uses less digits than its factorization.

188365138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244828.

The product of its digits is 138240, while the sum is 43.

The square root of 188365138 is about 13724.6179546099. The cubic root of 188365138 is about 573.2360692976.

The spelling of 188365138 in words is "one hundred eighty-eight million, three hundred sixty-five thousand, one hundred thirty-eight".