189906688 has 36 divisors (see below), whose sum is σ = 380245320. Its totient is φ = 94659584.

The previous prime is 189906683. The next prime is 189906701. The reversal of 189906688 is 886609981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189906683) 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, 98631 + ... + 100537.

It is an arithmetic number, because the mean of its divisors is an integer number (10562370).

Almost surely, 2^189906688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189906688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190122660).

189906688 is an abundant number, since it is smaller than the sum of its proper divisors (190338632).

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

189906688 is an equidigital number, since it uses as much as digits as its factorization.

189906688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 189906688 is about 13780.6635544157. The cubic root of 189906688 is about 574.7955800127.

The spelling of 189906688 in words is "one hundred eighty-nine million, nine hundred six thousand, six hundred eighty-eight".