8556864 has 56 divisors (see below), whose sum is σ = 23213568. Its totient is φ = 2780160.

The previous prime is 8556853. The next prime is 8556869. The reversal of 8556864 is 4686558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8556869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7329 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (414528).

Almost surely, 2^8556864 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 8556864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11606784).

8556864 is an abundant number, since it is smaller than the sum of its proper divisors (14656704).

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

8556864 is a wasteful number, since it uses less digits than its factorization.

8556864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1133 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 8556864 is about 2925.2117872045. The cubic root of 8556864 is about 204.5368405441.

The spelling of 8556864 in words is "eight million, five hundred fifty-six thousand, eight hundred sixty-four".