189297128 has 16 divisors (see below), whose sum is σ = 355078080. Its totient is φ = 94609648.

The previous prime is 189297113. The next prime is 189297131. The reversal of 189297128 is 821792981.

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 3 ways as a sum of consecutive naturals, for example, 35825 + ... + 40767.

It is an arithmetic number, because the mean of its divisors is an integer number (22192380).

Almost surely, 2^189297128 is an apocalyptic number.

It is an amenable number.

189297128 is a deficient number, since it is larger than the sum of its proper divisors (165780952).

189297128 is a wasteful number, since it uses less digits than its factorization.

189297128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736 (or 9732 counting only the distinct ones).

The product of its digits is 145152, while the sum is 47.

The square root of 189297128 is about 13758.5292818673. The cubic root of 189297128 is about 574.1799303991.

The spelling of 189297128 in words is "one hundred eighty-nine million, two hundred ninety-seven thousand, one hundred twenty-eight".