228811728 has 40 divisors (see below), whose sum is σ = 616799808. Its totient is φ = 72954112.

The previous prime is 228811727. The next prime is 228811733. The reversal of 228811728 is 827118822.

228811728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228811727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102525 + ... + 104732.

Almost surely, 2^228811728 is an apocalyptic number.

It is an amenable number.

228811728 is an abundant number, since it is smaller than the sum of its proper divisors (387988080).

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

228811728 is a wasteful number, since it uses less digits than its factorization.

228811728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207291 (or 207285 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 228811728 is about 15126.5239893374. The cubic root of 228811728 is about 611.6356069069.

The spelling of 228811728 in words is "two hundred twenty-eight million, eight hundred eleven thousand, seven hundred twenty-eight".