189445306 has 16 divisors (see below), whose sum is σ = 286715016. Its totient is φ = 93877056.

The previous prime is 189445261. The next prime is 189445327. The reversal of 189445306 is 603544981.

It can be written as a sum of positive squares in 4 ways, for example, as 153983281 + 35462025 = 12409^2 + 5955^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237300 + ... + 238096.

Almost surely, 2^189445306 is an apocalyptic number.

189445306 is a deficient number, since it is larger than the sum of its proper divisors (97269710).

189445306 is a wasteful number, since it uses less digits than its factorization.

189445306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 189445306 is about 13763.9131790345. The cubic root of 189445306 is about 574.3297101737.

The spelling of 189445306 in words is "one hundred eighty-nine million, four hundred forty-five thousand, three hundred six".