188689444 has 12 divisors (see below), whose sum is σ = 333611404. Its totient is φ = 93371904.

The previous prime is 188689433. The next prime is 188689453. The reversal of 188689444 is 444986881.

188689444 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 2 ways, for example, as 30935844 + 157753600 = 5562^2 + 12560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 188689391 and 188689400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242769 + ... + 243544.

Almost surely, 2^188689444 is an apocalyptic number.

It is an amenable number.

188689444 is a deficient number, since it is larger than the sum of its proper divisors (144921960).

188689444 is a wasteful number, since it uses less digits than its factorization.

188689444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486414 (or 486412 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 52.

The square root of 188689444 is about 13736.4276287541. The cubic root of 188689444 is about 573.5648585684.

The spelling of 188689444 in words is "one hundred eighty-eight million, six hundred eighty-nine thousand, four hundred forty-four".