866008228 has 6 divisors (see below), whose sum is σ = 1515514406. Its totient is φ = 433004112.

The previous prime is 866008223. The next prime is 866008267. The reversal of 866008228 is 822800668.

It can be written as a sum of positive squares in only one way, i.e., 549808704 + 316199524 = 23448^2 + 17782^2 .

It is not an unprimeable number, because it can be changed into a prime (866008223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108251025 + ... + 108251032.

Almost surely, 2^866008228 is an apocalyptic number.

It is an amenable number.

866008228 is a deficient number, since it is larger than the sum of its proper divisors (649506178).

866008228 is a wasteful number, since it uses less digits than its factorization.

866008228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216502061 (or 216502059 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 866008228 is about 29428.0177382032. The cubic root of 866008228 is about 953.1779914896.

The spelling of 866008228 in words is "eight hundred sixty-six million, eight thousand, two hundred twenty-eight".