228394228 has 6 divisors (see below), whose sum is σ = 399689906. Its totient is φ = 114197112.

The previous prime is 228394219. The next prime is 228394237. The reversal of 228394228 is 822493822.

228394228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228394219) and next prime (228394237).

It can be written as a sum of positive squares in only one way, i.e., 117765904 + 110628324 = 10852^2 + 10518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28549275 + ... + 28549282.

Almost surely, 2^228394228 is an apocalyptic number.

It is an amenable number.

228394228 is a deficient number, since it is larger than the sum of its proper divisors (171295678).

228394228 is a wasteful number, since it uses less digits than its factorization.

228394228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57098561 (or 57098559 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 228394228 is about 15112.7174260621. The cubic root of 228394228 is about 611.2633746235.

The spelling of 228394228 in words is "two hundred twenty-eight million, three hundred ninety-four thousand, two hundred twenty-eight".