228123216 has 50 divisors (see below), whose sum is σ = 660258522. Its totient is φ = 76040640.

The previous prime is 228123209. The next prime is 228123239. The reversal of 228123216 is 612321822.

It can be written as a sum of positive squares in only one way, i.e., 217857600 + 10265616 = 14760^2 + 3204^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 228123216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 86715 + ... + 89306.

Almost surely, 2^228123216 is an apocalyptic number.

It is an amenable number.

228123216 is an abundant number, since it is smaller than the sum of its proper divisors (432135306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228123216 is a wasteful number, since it uses less digits than its factorization.

228123216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176041 (or 176026 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 228123216 is about 15103.7484089215. The cubic root of 228123216 is about 611.0215044179.

The spelling of 228123216 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, two hundred sixteen".