189289906 has 16 divisors (see below), whose sum is σ = 315641088. Its totient is φ = 84546000.

The previous prime is 189289901. The next prime is 189289943. The reversal of 189289906 is 609982981.

It is not an unprimeable number, because it can be changed into a prime (189289901) 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, 116620 + ... + 118231.

It is an arithmetic number, because the mean of its divisors is an integer number (19727568).

Almost surely, 2^189289906 is an apocalyptic number.

189289906 is a deficient number, since it is larger than the sum of its proper divisors (126351182).

189289906 is a wasteful number, since it uses less digits than its factorization.

189289906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234897.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 189289906 is about 13758.2668239862. The cubic root of 189289906 is about 574.1726283334.

The spelling of 189289906 in words is "one hundred eighty-nine million, two hundred eighty-nine thousand, nine hundred six".