228120188 has 12 divisors (see below), whose sum is σ = 404020680. Its totient is φ = 112685712.

The previous prime is 228120181. The next prime is 228120199. The reversal of 228120188 is 881021822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228120181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343223 + ... + 343886.

It is an arithmetic number, because the mean of its divisors is an integer number (33668390).

Almost surely, 2^228120188 is an apocalyptic number.

It is an amenable number.

228120188 is a deficient number, since it is larger than the sum of its proper divisors (175900492).

228120188 is a wasteful number, since it uses less digits than its factorization.

228120188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687196 (or 687194 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 228120188 is about 15103.6481685717. The cubic root of 228120188 is about 611.0188009355.

The spelling of 228120188 in words is "two hundred twenty-eight million, one hundred twenty thousand, one hundred eighty-eight".