189928 has 8 divisors (see below), whose sum is σ = 356130. Its totient is φ = 94960.

The previous prime is 189913. The next prime is 189929. The reversal of 189928 is 829981.

It can be written as a sum of positive squares in only one way, i.e., 101124 + 88804 = 318^2 + 298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (189929) by changing a digit.

189928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11863 + ... + 11878.

2¹⁸⁹⁹²⁸ is an apocalyptic number.

It is an amenable number.

189928 is a deficient number, since it is larger than the sum of its proper divisors (166202).

189928 is a wasteful number, since it uses less digits than its factorization.

189928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23747 (or 23743 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 189928 is about 435.8072968641. The cubic root of 189928 is about 57.4817081072.

The spelling of 189928 in words is "one hundred eighty-nine thousand, nine hundred twenty-eight".