8440866 has 48 divisors (see below), whose sum is σ = 21585408. Its totient is φ = 2332800.

The previous prime is 8440853. The next prime is 8440877. The reversal of 8440866 is 6680448.

It is a self number, because there is not a number n which added to its sum of digits gives 8440866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2826 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (449696).

Almost surely, 2^8440866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8440866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10792704).

8440866 is an abundant number, since it is smaller than the sum of its proper divisors (13144542).

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

8440866 is a wasteful number, since it uses less digits than its factorization.

8440866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 8440866 is about 2905.3168501904. The cubic root of 8440866 is about 203.6083894372.

The spelling of 8440866 in words is "eight million, four hundred forty thousand, eight hundred sixty-six".