188138750 has 40 divisors (see below), whose sum is σ = 361346832. Its totient is φ = 73400000.

The previous prime is 188138749. The next prime is 188138771. The reversal of 188138750 is 57831881.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 188138698 and 188138707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49415 + ... + 53085.

Almost surely, 2^188138750 is an apocalyptic number.

188138750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188138750 is a deficient number, since it is larger than the sum of its proper divisors (173208082).

188138750 is an equidigital number, since it uses as much as digits as its factorization.

188138750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 188138750 is about 13716.3679594855. The cubic root of 188138750 is about 573.0063279324.

The spelling of 188138750 in words is "one hundred eighty-eight million, one hundred thirty-eight thousand, seven hundred fifty".