866845808 has 40 divisors (see below), whose sum is σ = 1741555200. Its totient is φ = 417539520.

The previous prime is 866845801. The next prime is 866845843. The reversal of 866845808 is 808548668.

It is a self number, because there is not a number n which added to its sum of digits gives 866845808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866845801) 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, 108743 + ... + 116441.

It is an arithmetic number, because the mean of its divisors is an integer number (43538880).

Almost surely, 2^866845808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866845808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870777600).

866845808 is an abundant number, since it is smaller than the sum of its proper divisors (874709392).

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

866845808 is a wasteful number, since it uses less digits than its factorization.

866845808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965 (or 7959 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 53.

The square root of 866845808 is about 29442.2452948140. The cubic root of 866845808 is about 953.4851885614.

The spelling of 866845808 in words is "eight hundred sixty-six million, eight hundred forty-five thousand, eight hundred eight".