188240928 has 96 divisors (see below), whose sum is σ = 522289152. Its totient is φ = 59270400.

The previous prime is 188240917. The next prime is 188240957. The reversal of 188240928 is 829042881.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 188240928.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127233 + ... + 128703.

It is an arithmetic number, because the mean of its divisors is an integer number (5440512).

Almost surely, 2^188240928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188240928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261144576).

188240928 is an abundant number, since it is smaller than the sum of its proper divisors (334048224).

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

188240928 is a wasteful number, since it uses less digits than its factorization.

188240928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 188240928 is about 13720.0921279706. The cubic root of 188240928 is about 573.1100422470.

The spelling of 188240928 in words is "one hundred eighty-eight million, two hundred forty thousand, nine hundred twenty-eight".