189198438 has 32 divisors (see below), whose sum is σ = 444552192. Its totient is φ = 52922400.

The previous prime is 189198433. The next prime is 189198439. The reversal of 189198438 is 834891981.

189198438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189198431) 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, 109398 + ... + 111113.

It is an arithmetic number, because the mean of its divisors is an integer number (13892256).

Almost surely, 2^189198438 is an apocalyptic number.

189198438 is an abundant number, since it is smaller than the sum of its proper divisors (255353754).

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

189198438 is a wasteful number, since it uses less digits than its factorization.

189198438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220540.

The product of its digits is 497664, while the sum is 51.

The square root of 189198438 is about 13754.9423117656. The cubic root of 189198438 is about 574.0801302096.

The spelling of 189198438 in words is "one hundred eighty-nine million, one hundred ninety-eight thousand, four hundred thirty-eight".