6864564 has 48 divisors (see below), whose sum is σ = 18579456. Its totient is φ = 1932000.

The previous prime is 6864553. The next prime is 6864581. The reversal of 6864564 is 4654686.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5389 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (387072).

Almost surely, 2^6864564 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 6864564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9289728).

6864564 is an abundant number, since it is smaller than the sum of its proper divisors (11714892).

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

6864564 is a wasteful number, since it uses less digits than its factorization.

6864564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1234 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 6864564 is about 2620.0312975230. The cubic root of 6864564 is about 190.0513619222.

The spelling of 6864564 in words is "six million, eight hundred sixty-four thousand, five hundred sixty-four".