188830906 has 24 divisors (see below), whose sum is σ = 319766580. Its totient is φ = 83508480.

The previous prime is 188830879. The next prime is 188830921. The reversal of 188830906 is 609038881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134676025 + 54154881 = 11605^2 + 7359^2 .

It is a super-2 number, since 2×188830906² = 71314222121561672, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1591 + ... + 19498.

Almost surely, 2^188830906 is an apocalyptic number.

188830906 is a deficient number, since it is larger than the sum of its proper divisors (130935674).

188830906 is a wasteful number, since it uses less digits than its factorization.

188830906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21150 (or 21139 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 188830906 is about 13741.5758193884. The cubic root of 188830906 is about 573.7081581656.

The spelling of 188830906 in words is "one hundred eighty-eight million, eight hundred thirty thousand, nine hundred six".