188448642 has 24 divisors (see below), whose sum is σ = 415001340. Its totient is φ = 61786080.

The previous prime is 188448619. The next prime is 188448649. The reversal of 188448642 is 246844881.

It can be written as a sum of positive squares in 2 ways, for example, as 181683441 + 6765201 = 13479^2 + 2601^2 .

It is not an unprimeable number, because it can be changed into a prime (188448649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84717 + ... + 86912.

Almost surely, 2^188448642 is an apocalyptic number.

188448642 is an abundant number, since it is smaller than the sum of its proper divisors (226552698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

188448642 is a wasteful number, since it uses less digits than its factorization.

188448642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171698 (or 171695 counting only the distinct ones).

The product of its digits is 393216, while the sum is 45.

The square root of 188448642 is about 13727.6597422867. The cubic root of 188448642 is about 573.3207637260.

The spelling of 188448642 in words is "one hundred eighty-eight million, four hundred forty-eight thousand, six hundred forty-two".