189236728 has 8 divisors (see below), whose sum is σ = 354818880. Its totient is φ = 94618360.

The previous prime is 189236717. The next prime is 189236737. The reversal of 189236728 is 827632981.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11827288 + ... + 11827303.

It is an arithmetic number, because the mean of its divisors is an integer number (44352360).

Almost surely, 2^189236728 is an apocalyptic number.

It is an amenable number.

189236728 is a deficient number, since it is larger than the sum of its proper divisors (165582152).

189236728 is a wasteful number, since it uses less digits than its factorization.

189236728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23654597 (or 23654593 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 189236728 is about 13756.3341046952. The cubic root of 189236728 is about 574.1188550632.

It can be divided in two parts, 18923 and 6728, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 189236728 in words is "one hundred eighty-nine million, two hundred thirty-six thousand, seven hundred twenty-eight".