866244648 has 32 divisors (see below), whose sum is σ = 2182671360. Its totient is φ = 286473600.

The previous prime is 866244647. The next prime is 866244721. The reversal of 866244648 is 846442668.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 866244597 and 866244606.

It is not an unprimeable number, because it can be changed into a prime (866244647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139053 + ... + 145148.

It is an arithmetic number, because the mean of its divisors is an integer number (68208480).

Almost surely, 2^866244648 is an apocalyptic number.

It is an amenable number.

866244648 is an abundant number, since it is smaller than the sum of its proper divisors (1316426712).

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

866244648 is a wasteful number, since it uses less digits than its factorization.

866244648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284337 (or 284333 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The square root of 866244648 is about 29432.0343843235. The cubic root of 866244648 is about 953.2647227045.

The spelling of 866244648 in words is "eight hundred sixty-six million, two hundred forty-four thousand, six hundred forty-eight".