228563928 has 24 divisors (see below), whose sum is σ = 619027500. Its totient is φ = 76187952.

The previous prime is 228563927. The next prime is 228563941. The reversal of 228563928 is 829365822.

It is a happy number.

228563928 is a `hidden beast` number, since 2 + 2 + 8 + 5 + 639 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228563921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587178 + ... + 1587321.

Almost surely, 2^228563928 is an apocalyptic number.

It is an amenable number.

228563928 is an abundant number, since it is smaller than the sum of its proper divisors (390463572).

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

228563928 is a wasteful number, since it uses less digits than its factorization.

228563928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174511 (or 3174504 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 228563928 is about 15118.3308602504. The cubic root of 228563928 is about 611.4147294613.

The spelling of 228563928 in words is "two hundred twenty-eight million, five hundred sixty-three thousand, nine hundred twenty-eight".