189742208 has 64 divisors (see below), whose sum is σ = 404736000. Its totient is φ = 88335360.

The previous prime is 189742199. The next prime is 189742211. The reversal of 189742208 is 802247981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 147713 + ... + 148991.

It is an arithmetic number, because the mean of its divisors is an integer number (6324000).

Almost surely, 2^189742208 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 189742208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202368000).

189742208 is an abundant number, since it is smaller than the sum of its proper divisors (214993792).

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

189742208 is a wasteful number, since it uses less digits than its factorization.

189742208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 189742208 is about 13774.6944793705. The cubic root of 189742208 is about 574.6295867630.

The spelling of 189742208 in words is "one hundred eighty-nine million, seven hundred forty-two thousand, two hundred eight".