188209242 has 24 divisors (see below), whose sum is σ = 439155444. Its totient is φ = 57910464.

The previous prime is 188209213. The next prime is 188209247. The reversal of 188209242 is 242902881.

It can be written as a sum of positive squares in 2 ways, for example, as 186568281 + 1640961 = 13659^2 + 1281^2 .

It is a junction number, because it is equal to n+sod(n) for n = 188209197 and 188209206.

It is not an unprimeable number, because it can be changed into a prime (188209247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401923 + ... + 402390.

Almost surely, 2^188209242 is an apocalyptic number.

188209242 is an abundant number, since it is smaller than the sum of its proper divisors (250946202).

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

188209242 is a wasteful number, since it uses less digits than its factorization.

188209242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804334 (or 804331 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 188209242 is about 13718.9373495180. The cubic root of 188209242 is about 573.0778838424.

The spelling of 188209242 in words is "one hundred eighty-eight million, two hundred nine thousand, two hundred forty-two".