866886228 has 54 divisors (see below), whose sum is σ = 2361592142. Its totient is φ = 266538240.

The previous prime is 866886199. The next prime is 866886239. The reversal of 866886228 is 822688668.

866886228 is a `hidden beast` number, since 8 + 6 + 6 + 8 + 8 + 622 + 8 = 666.

866886228 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 3 ways, for example, as 22867524 + 844018704 = 4782^2 + 29052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 636268 + ... + 637628.

Almost surely, 2^866886228 is an apocalyptic number.

It is an amenable number.

866886228 is an abundant number, since it is smaller than the sum of its proper divisors (1494705914).

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

866886228 is a wasteful number, since it uses less digits than its factorization.

866886228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 1379 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 54.

The square root of 866886228 is about 29442.9317154389. The cubic root of 866886228 is about 953.5000082952.

The spelling of 866886228 in words is "eight hundred sixty-six million, eight hundred eighty-six thousand, two hundred twenty-eight".