866038812 has 24 divisors (see below), whose sum is σ = 2022515712. Its totient is φ = 288428400.

The previous prime is 866038807. The next prime is 866038853. The reversal of 866038812 is 218830668.

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, 16764 + ... + 44867.

It is an arithmetic number, because the mean of its divisors is an integer number (84271488).

Almost surely, 2^866038812 is an apocalyptic number.

It is an amenable number.

866038812 is an abundant number, since it is smaller than the sum of its proper divisors (1156476900).

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

866038812 is a wasteful number, since it uses less digits than its factorization.

866038812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62809 (or 62807 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 866038812 is about 29428.5373744602. The cubic root of 866038812 is about 953.1892121885.

The spelling of 866038812 in words is "eight hundred sixty-six million, thirty-eight thousand, eight hundred twelve".