189665285 has 16 divisors (see below), whose sum is σ = 235702272. Its totient is φ = 146361600.

The previous prime is 189665279. The next prime is 189665327. The reversal of 189665285 is 582566981.

It is not a de Polignac number, because 189665285 - 2⁴ = 189665269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50420 + ... + 54050.

It is an arithmetic number, because the mean of its divisors is an integer number (14731392).

Almost surely, 2^189665285 is an apocalyptic number.

It is an amenable number.

189665285 is a deficient number, since it is larger than the sum of its proper divisors (46036987).

189665285 is a wasteful number, since it uses less digits than its factorization.

189665285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004.

The product of its digits is 1036800, while the sum is 50.

The square root of 189665285 is about 13771.9020109787. The cubic root of 189665285 is about 574.5519231322.

The spelling of 189665285 in words is "one hundred eighty-nine million, six hundred sixty-five thousand, two hundred eighty-five".