188938764 has 96 divisors (see below), whose sum is σ = 562060800. Its totient is φ = 53766720.

The previous prime is 188938733. The next prime is 188938787. The reversal of 188938764 is 467839881.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 188938764.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 370942 + ... + 371450.

It is an arithmetic number, because the mean of its divisors is an integer number (5854800).

Almost surely, 2^188938764 is an apocalyptic number.

188938764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188938764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281030400).

188938764 is an abundant number, since it is smaller than the sum of its proper divisors (373122036).

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

188938764 is a wasteful number, since it uses less digits than its factorization.

188938764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1012 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 188938764 is about 13745.4997726529. The cubic root of 188938764 is about 573.8173691665.

The spelling of 188938764 in words is "one hundred eighty-eight million, nine hundred thirty-eight thousand, seven hundred sixty-four".