189438156 has 48 divisors (see below), whose sum is σ = 492626400. Its totient is φ = 62954496.

The previous prime is 189438149. The next prime is 189438167. The reversal of 189438156 is 651834981.

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 15 ways as a sum of consecutive naturals, for example, 35640 + ... + 40608.

It is an arithmetic number, because the mean of its divisors is an integer number (10263050).

Almost surely, 2^189438156 is an apocalyptic number.

It is an amenable number.

189438156 is an abundant number, since it is smaller than the sum of its proper divisors (303188244).

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

189438156 is a wasteful number, since it uses less digits than its factorization.

189438156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335 (or 5327 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 189438156 is about 13763.6534394034. The cubic root of 189438156 is about 574.3224846774.

The spelling of 189438156 in words is "one hundred eighty-nine million, four hundred thirty-eight thousand, one hundred fifty-six".