188427228 has 24 divisors (see below), whose sum is σ = 479633280. Its totient is φ = 57099120.

The previous prime is 188427227. The next prime is 188427257. The reversal of 188427228 is 822724881.

It is a super-4 number, since 4×188427228⁴ (a number of 34 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188427228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188427227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 713608 + ... + 713871.

It is an arithmetic number, because the mean of its divisors is an integer number (19984720).

Almost surely, 2^188427228 is an apocalyptic number.

It is an amenable number.

188427228 is an abundant number, since it is smaller than the sum of its proper divisors (291206052).

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

188427228 is a wasteful number, since it uses less digits than its factorization.

188427228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427497 (or 1427495 counting only the distinct ones).

The product of its digits is 114688, while the sum is 42.

The square root of 188427228 is about 13726.8797619852. The cubic root of 188427228 is about 573.2990468349.

The spelling of 188427228 in words is "one hundred eighty-eight million, four hundred twenty-seven thousand, two hundred twenty-eight".