188649668 has 12 divisors (see below), whose sum is σ = 335732880. Its totient is φ = 92725992.

The previous prime is 188649661. The next prime is 188649683. The reversal of 188649668 is 866946881.

188649668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (188649661) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 399446 + ... + 399917.

It is an arithmetic number, because the mean of its divisors is an integer number (27977740).

Almost surely, 2^188649668 is an apocalyptic number.

It is an amenable number.

188649668 is a deficient number, since it is larger than the sum of its proper divisors (147083212).

188649668 is a wasteful number, since it uses less digits than its factorization.

188649668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799426 (or 799424 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 56.

The square root of 188649668 is about 13734.9797233196. The cubic root of 188649668 is about 573.5245529766.

The spelling of 188649668 in words is "one hundred eighty-eight million, six hundred forty-nine thousand, six hundred sixty-eight".