189140438 has 4 divisors (see below), whose sum is σ = 283710660. Its totient is φ = 94570218.

The previous prime is 189140437. The next prime is 189140447. The reversal of 189140438 is 834041981.

189140438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189140437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47285108 + ... + 47285111.

It is an arithmetic number, because the mean of its divisors is an integer number (70927665).

Almost surely, 2^189140438 is an apocalyptic number.

189140438 is a deficient number, since it is larger than the sum of its proper divisors (94570222).

189140438 is an equidigital number, since it uses as much as digits as its factorization.

189140438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94570221.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 189140438 is about 13752.8338170720. The cubic root of 189140438 is about 574.0214615600.

The spelling of 189140438 in words is "one hundred eighty-nine million, one hundred forty thousand, four hundred thirty-eight".