189444437 has 18 divisors (see below), whose sum is σ = 238640418. Its totient is φ = 149883552.

The previous prime is 189444427. The next prime is 189444469. The reversal of 189444437 is 734444981.

189444437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 9186961 + 180257476 = 3031^2 + 13426^2 .

It is not a de Polignac number, because 189444437 - 2¹⁰ = 189443413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189444407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3158 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (13257801).

Almost surely, 2^189444437 is an apocalyptic number.

It is an amenable number.

189444437 is a deficient number, since it is larger than the sum of its proper divisors (49195981).

189444437 is a wasteful number, since it uses less digits than its factorization.

189444437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22917 (or 22897 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 189444437 is about 13763.8816109410. The cubic root of 189444437 is about 574.3288320077.

The spelling of 189444437 in words is "one hundred eighty-nine million, four hundred forty-four thousand, four hundred thirty-seven".