188380816 has 20 divisors (see below), whose sum is σ = 393064252. Its totient is φ = 86944896.

The previous prime is 188380799. The next prime is 188380823. The reversal of 188380816 is 618083881.

188380816 is nontrivially palindromic in base 15.

188380816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 46294416 + 142086400 = 6804^2 + 11920^2 .

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, 452631 + ... + 453046.

Almost surely, 2^188380816 is an apocalyptic number.

188380816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

188380816 is an abundant number, since it is smaller than the sum of its proper divisors (204683436).

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

188380816 is a wasteful number, since it uses less digits than its factorization.

188380816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905698 (or 905692 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 43.

The square root of 188380816 is about 13725.1891061654. The cubic root of 188380816 is about 573.2519727106.

The spelling of 188380816 in words is "one hundred eighty-eight million, three hundred eighty thousand, eight hundred sixteen".