228665888 has 24 divisors (see below), whose sum is σ = 491112720. Its totient is φ = 103938880.

The previous prime is 228665869. The next prime is 228665911. The reversal of 228665888 is 888566822.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324458 + ... + 325161.

It is an arithmetic number, because the mean of its divisors is an integer number (20463030).

Almost surely, 2^228665888 is an apocalyptic number.

It is an amenable number.

228665888 is an abundant number, since it is smaller than the sum of its proper divisors (262446832).

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

228665888 is a wasteful number, since it uses less digits than its factorization.

228665888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649640 (or 649632 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The square root of 228665888 is about 15121.7025496470. The cubic root of 228665888 is about 611.5056312044.

The spelling of 228665888 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, eight hundred eighty-eight".