189431946 has 40 divisors (see below), whose sum is σ = 463060224. Its totient is φ = 57403080.

The previous prime is 189431939. The next prime is 189431947. The reversal of 189431946 is 649134981.

It is not an unprimeable number, because it can be changed into a prime (189431947) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51370 + ... + 54933.

Almost surely, 2^189431946 is an apocalyptic number.

189431946 is an abundant number, since it is smaller than the sum of its proper divisors (273628278).

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

189431946 is a wasteful number, since it uses less digits than its factorization.

189431946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106328 (or 106319 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 189431946 is about 13763.4278433826. The cubic root of 189431946 is about 574.3162089589.

The spelling of 189431946 in words is "one hundred eighty-nine million, four hundred thirty-one thousand, nine hundred forty-six".