188805930 has 32 divisors (see below), whose sum is σ = 453532608. Its totient is φ = 50304000.

The previous prime is 188805899. The next prime is 188805949. The reversal of 188805930 is 39508881.

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 15 ways as a sum of consecutive naturals, for example, 46065 + ... + 49995.

It is an arithmetic number, because the mean of its divisors is an integer number (14172894).

Almost surely, 2^188805930 is an apocalyptic number.

188805930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188805930 is an abundant number, since it is smaller than the sum of its proper divisors (264726678).

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

188805930 is a wasteful number, since it uses less digits than its factorization.

188805930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 188805930 is about 13740.6670143774. The cubic root of 188805930 is about 573.6828629300.

The spelling of 188805930 in words is "one hundred eighty-eight million, eight hundred five thousand, nine hundred thirty".