228161188 has 6 divisors (see below), whose sum is σ = 399282086. Its totient is φ = 114080592.

The previous prime is 228161161. The next prime is 228161189. The reversal of 228161188 is 881161822.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 227165184 + 996004 = 15072^2 + 998^2 .

It is not an unprimeable number, because it can be changed into a prime (228161189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28520145 + ... + 28520152.

Almost surely, 2^228161188 is an apocalyptic number.

It is an amenable number.

228161188 is a deficient number, since it is larger than the sum of its proper divisors (171120898).

228161188 is a wasteful number, since it uses less digits than its factorization.

228161188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57040301 (or 57040299 counting only the distinct ones).

The product of its digits is 12288, while the sum is 37.

The square root of 228161188 is about 15105.0053955634. The cubic root of 228161188 is about 611.0554048420.

The spelling of 228161188 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, one hundred eighty-eight".