188820112 has 40 divisors (see below), whose sum is σ = 399002240. Its totient is φ = 86037120.

The previous prime is 188820091. The next prime is 188820143. The reversal of 188820112 is 211028881.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10687 + ... + 22177.

It is an arithmetic number, because the mean of its divisors is an integer number (9975056).

Almost surely, 2^188820112 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 188820112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199501120).

188820112 is an abundant number, since it is smaller than the sum of its proper divisors (210182128).

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

188820112 is a wasteful number, since it uses less digits than its factorization.

188820112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591 (or 11585 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 188820112 is about 13741.1830640597. The cubic root of 188820112 is about 573.6972264737.

Adding to 188820112 its reverse (211028881), we get a palindrome (399848993).

The spelling of 188820112 in words is "one hundred eighty-eight million, eight hundred twenty thousand, one hundred twelve".