188930238 has 32 divisors (see below), whose sum is σ = 437314560. Its totient is φ = 53295840.

The previous prime is 188930207. The next prime is 188930239. The reversal of 188930238 is 832039881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 188930238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188930239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25153 + ... + 31788.

It is an arithmetic number, because the mean of its divisors is an integer number (13666080).

Almost surely, 2^188930238 is an apocalyptic number.

188930238 is an abundant number, since it is smaller than the sum of its proper divisors (248384322).

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

188930238 is a wasteful number, since it uses less digits than its factorization.

188930238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57032.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 188930238 is about 13745.1896312856. The cubic root of 188930238 is about 573.8087377270.

The spelling of 188930238 in words is "one hundred eighty-eight million, nine hundred thirty thousand, two hundred thirty-eight".