189312442 has 16 divisors (see below), whose sum is σ = 328007232. Its totient is φ = 80989120.

The previous prime is 189312437. The next prime is 189312451. The reversal of 189312442 is 244213981.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 189312398 and 189312407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252718 + ... + 253465.

It is an arithmetic number, because the mean of its divisors is an integer number (20500452).

Almost surely, 2^189312442 is an apocalyptic number.

189312442 is a deficient number, since it is larger than the sum of its proper divisors (138694790).

189312442 is a wasteful number, since it uses less digits than its factorization.

189312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506213.

The product of its digits is 13824, while the sum is 34.

The square root of 189312442 is about 13759.0857981190. The cubic root of 189312442 is about 574.1954135612.

The spelling of 189312442 in words is "one hundred eighty-nine million, three hundred twelve thousand, four hundred forty-two".