866228244 has 24 divisors (see below), whose sum is σ = 2309942208. Its totient is φ = 247493760.

The previous prime is 866228239. The next prime is 866228267. The reversal of 866228244 is 442822668.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 866228196 and 866228205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5156037 + ... + 5156204.

It is an arithmetic number, because the mean of its divisors is an integer number (96247592).

Almost surely, 2^866228244 is an apocalyptic number.

866228244 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

866228244 is an abundant number, since it is smaller than the sum of its proper divisors (1443713964).

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

866228244 is a wasteful number, since it uses less digits than its factorization.

866228244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312255 (or 10312253 counting only the distinct ones).

The product of its digits is 294912, while the sum is 42.

The square root of 866228244 is about 29431.7557070590. The cubic root of 866228244 is about 953.2587053693.

The spelling of 866228244 in words is "eight hundred sixty-six million, two hundred twenty-eight thousand, two hundred forty-four".