228368628 has 36 divisors (see below), whose sum is σ = 586734148. Its totient is φ = 74874240.

The previous prime is 228368627. The next prime is 228368641. The reversal of 228368628 is 826863822.

228368628 is a `hidden beast` number, since 228 + 368 + 62 + 8 = 666.

228368628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 222666084 = 2388^2 + 14922^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228368627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49801 + ... + 54192.

Almost surely, 2^228368628 is an apocalyptic number.

It is an amenable number.

228368628 is an abundant number, since it is smaller than the sum of its proper divisors (358365520).

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

228368628 is a wasteful number, since it uses less digits than its factorization.

228368628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104064 (or 104059 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 228368628 is about 15111.8704335367. The cubic root of 228368628 is about 611.2405355655.

The spelling of 228368628 in words is "two hundred twenty-eight million, three hundred sixty-eight thousand, six hundred twenty-eight".