189375138 has 32 divisors (see below), whose sum is σ = 445590720. Its totient is φ = 59411520.

The previous prime is 189375119. The next prime is 189375203. The reversal of 189375138 is 831573981.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 189375093 and 189375102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102228 + ... + 104063.

It is an arithmetic number, because the mean of its divisors is an integer number (13924710).

Almost surely, 2^189375138 is an apocalyptic number.

189375138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

189375138 is an abundant number, since it is smaller than the sum of its proper divisors (256215582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189375138 is a wasteful number, since it uses less digits than its factorization.

189375138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206319 (or 206313 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 189375138 is about 13761.3639585617. The cubic root of 189375138 is about 574.2587934107.

The spelling of 189375138 in words is "one hundred eighty-nine million, three hundred seventy-five thousand, one hundred thirty-eight".