189039042 has 32 divisors (see below), whose sum is σ = 421948800. Its totient is φ = 62733744.

The previous prime is 189039041. The next prime is 189039079. The reversal of 189039042 is 240930981.

It is a junction number, because it is equal to n+sod(n) for n = 189038988 and 189039006.

It is not an unprimeable number, because it can be changed into a prime (189039041) 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, 4723 + ... + 20009.

It is an arithmetic number, because the mean of its divisors is an integer number (13185900).

Almost surely, 2^189039042 is an apocalyptic number.

189039042 is an abundant number, since it is smaller than the sum of its proper divisors (232909758).

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

189039042 is a wasteful number, since it uses less digits than its factorization.

189039042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15527 (or 15521 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 189039042 is about 13749.1469553569. The cubic root of 189039042 is about 573.9188678038.

The spelling of 189039042 in words is "one hundred eighty-nine million, thirty-nine thousand, forty-two".