538216228 has 18 divisors (see below), whose sum is σ = 1035288758. Its totient is φ = 244643520.

The previous prime is 538216207. The next prime is 538216241. The reversal of 538216228 is 822612835.

It can be written as a sum of positive squares in only one way, i.e., 454457124 + 83759104 = 21318^2 + 9152^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555525 + ... + 556492.

Almost surely, 2^538216228 is an apocalyptic number.

It is an amenable number.

538216228 is a deficient number, since it is larger than the sum of its proper divisors (497072530).

538216228 is a wasteful number, since it uses less digits than its factorization.

538216228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112043 (or 1112030 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 538216228 is about 23199.4876667568. The cubic root of 538216228 is about 813.4276473239.

The spelling of 538216228 in words is "five hundred thirty-eight million, two hundred sixteen thousand, two hundred twenty-eight".