189535728 has 40 divisors (see below), whose sum is σ = 491857408. Its totient is φ = 62891712.

The previous prime is 189535727. The next prime is 189535733. The reversal of 189535728 is 827535981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189535721) 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 7 ways as a sum of consecutive naturals, for example, 1851 + ... + 19557.

Almost surely, 2^189535728 is an apocalyptic number.

It is an amenable number.

189535728 is an abundant number, since it is smaller than the sum of its proper divisors (302321680).

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

189535728 is a wasteful number, since it uses less digits than its factorization.

189535728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17941 (or 17935 counting only the distinct ones).

The product of its digits is 604800, while the sum is 48.

The square root of 189535728 is about 13767.1975361727. The cubic root of 189535728 is about 574.4210712495.

The spelling of 189535728 in words is "one hundred eighty-nine million, five hundred thirty-five thousand, seven hundred twenty-eight".