188189442 has 24 divisors (see below), whose sum is σ = 465993216. Its totient is φ = 53768376.

The previous prime is 188189431. The next prime is 188189479. The reversal of 188189442 is 244981881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 746658 + ... + 746909.

It is an arithmetic number, because the mean of its divisors is an integer number (19416384).

Almost surely, 2^188189442 is an apocalyptic number.

188189442 is an abundant number, since it is smaller than the sum of its proper divisors (277803774).

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

188189442 is a wasteful number, since it uses less digits than its factorization.

188189442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493582 (or 1493579 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 188189442 is about 13718.2157003016. The cubic root of 188189442 is about 573.0577868129.

The spelling of 188189442 in words is "one hundred eighty-eight million, one hundred eighty-nine thousand, four hundred forty-two".