228137288 has 8 divisors (see below), whose sum is σ = 427757430. Its totient is φ = 114068640.

The previous prime is 228137269. The next prime is 228137291. The reversal of 228137288 is 882731822.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 182196004 + 45941284 = 13498^2 + 6778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14258573 + ... + 14258588.

Almost surely, 2^228137288 is an apocalyptic number.

It is an amenable number.

228137288 is a deficient number, since it is larger than the sum of its proper divisors (199620142).

228137288 is a wasteful number, since it uses less digits than its factorization.

228137288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28517167 (or 28517163 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 228137288 is about 15104.2142463618. The cubic root of 228137288 is about 611.0340679759.

The spelling of 228137288 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, two hundred eighty-eight".