189039242 has 16 divisors (see below), whose sum is σ = 324283392. Its totient is φ = 80962800.

The previous prime is 189039239. The next prime is 189039247. The reversal of 189039242 is 242930981.

It is a junction number, because it is equal to n+sod(n) for n = 189039196 and 189039205.

It is not an unprimeable number, because it can be changed into a prime (189039247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23063 + ... + 30165.

It is an arithmetic number, because the mean of its divisors is an integer number (20267712).

Almost surely, 2^189039242 is an apocalyptic number.

189039242 is a deficient number, since it is larger than the sum of its proper divisors (135244150).

189039242 is a wasteful number, since it uses less digits than its factorization.

189039242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9013.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 189039242 is about 13749.1542285335. The cubic root of 189039242 is about 573.9190702024.

The spelling of 189039242 in words is "one hundred eighty-nine million, thirty-nine thousand, two hundred forty-two".