228878566 has 48 divisors (see below), whose sum is σ = 419606784. Its totient is φ = 91528272.

The previous prime is 228878561. The next prime is 228878567. The reversal of 228878566 is 665878822.

228878566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228878561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2222071 + ... + 2222173.

It is an arithmetic number, because the mean of its divisors is an integer number (8741808).

Almost surely, 2^228878566 is an apocalyptic number.

228878566 is a deficient number, since it is larger than the sum of its proper divisors (190728218).

228878566 is a wasteful number, since it uses less digits than its factorization.

228878566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 202 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 228878566 is about 15128.7331260750. The cubic root of 228878566 is about 611.6951558953.

The spelling of 228878566 in words is "two hundred twenty-eight million, eight hundred seventy-eight thousand, five hundred sixty-six".