189113388 has 12 divisors (see below), whose sum is σ = 441264600. Its totient is φ = 63037792.

The previous prime is 189113377. The next prime is 189113411. The reversal of 189113388 is 883311981.

It is a tau number, because it is divible by the number of its divisors (12).

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, 7879713 + ... + 7879736.

It is an arithmetic number, because the mean of its divisors is an integer number (36772050).

Almost surely, 2^189113388 is an apocalyptic number.

It is an amenable number.

189113388 is an abundant number, since it is smaller than the sum of its proper divisors (252151212).

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

189113388 is a wasteful number, since it uses less digits than its factorization.

189113388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15759456 (or 15759454 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 189113388 is about 13751.8503482259. The cubic root of 189113388 is about 573.9940956144.

The spelling of 189113388 in words is "one hundred eighty-nine million, one hundred thirteen thousand, three hundred eighty-eight".