228165188 has 24 divisors (see below), whose sum is σ = 404668992. Its totient is φ = 112554144.

The previous prime is 228165169. The next prime is 228165209. The reversal of 228165188 is 881561822.

It is a happy number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129731 + ... + 131477.

It is an arithmetic number, because the mean of its divisors is an integer number (16861208).

Almost surely, 2^228165188 is an apocalyptic number.

It is an amenable number.

228165188 is a deficient number, since it is larger than the sum of its proper divisors (176503804).

228165188 is a wasteful number, since it uses less digits than its factorization.

228165188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2169 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 228165188 is about 15105.1378014237. The cubic root of 228165188 is about 611.0589757201.

The spelling of 228165188 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred eighty-eight".