189186928 has 80 divisors (see below), whose sum is σ = 433075456. Its totient is φ = 78382080.

The previous prime is 189186917. The next prime is 189186929. The reversal of 189186928 is 829681981.

189186928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189186929) by changing a digit.

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, 784888 + ... + 785128.

Almost surely, 2^189186928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189186928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216537728).

189186928 is an abundant number, since it is smaller than the sum of its proper divisors (243888528).

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

189186928 is a wasteful number, since it uses less digits than its factorization.

189186928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its digits is 497664, while the sum is 52.

The square root of 189186928 is about 13754.5239103358. The cubic root of 189186928 is about 574.0684884709.

The spelling of 189186928 in words is "one hundred eighty-nine million, one hundred eighty-six thousand, nine hundred twenty-eight".