188445728 has 12 divisors (see below), whose sum is σ = 371002590. Its totient is φ = 94222848.

The previous prime is 188445713. The next prime is 188445769. The reversal of 188445728 is 827544881.

It can be written as a sum of positive squares in only one way, i.e., 128414224 + 60031504 = 11332^2 + 7748^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2944433 + ... + 2944496.

Almost surely, 2^188445728 is an apocalyptic number.

It is an amenable number.

188445728 is a deficient number, since it is larger than the sum of its proper divisors (182556862).

188445728 is an equidigital number, since it uses as much as digits as its factorization.

188445728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888939 (or 5888931 counting only the distinct ones).

The product of its digits is 573440, while the sum is 47.

The square root of 188445728 is about 13727.5536057959. The cubic root of 188445728 is about 573.3178086055.

The spelling of 188445728 in words is "one hundred eighty-eight million, four hundred forty-five thousand, seven hundred twenty-eight".