188839972 has 24 divisors (see below), whose sum is σ = 342218240. Its totient is φ = 91082880.

The previous prime is 188839951. The next prime is 188839991. The reversal of 188839972 is 279938881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39529 + ... + 44047.

Almost surely, 2^188839972 is an apocalyptic number.

It is an amenable number.

188839972 is a deficient number, since it is larger than the sum of its proper divisors (153378268).

188839972 is a wasteful number, since it uses less digits than its factorization.

188839972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4889 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The square root of 188839972 is about 13741.9056902600. The cubic root of 188839972 is about 573.7173394926.

The spelling of 188839972 in words is "one hundred eighty-eight million, eight hundred thirty-nine thousand, nine hundred seventy-two".