6868644 has 12 divisors (see below), whose sum is σ = 16026864. Its totient is φ = 2289544.

The previous prime is 6868613. The next prime is 6868649. The reversal of 6868644 is 4468686.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 6868596 and 6868605.

It is not an unprimeable number, because it can be changed into a prime (6868649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286182 + ... + 286205.

It is an arithmetic number, because the mean of its divisors is an integer number (1335572).

Almost surely, 2^6868644 is an apocalyptic number.

It is an amenable number.

6868644 is an abundant number, since it is smaller than the sum of its proper divisors (9158220).

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

6868644 is a wasteful number, since it uses less digits than its factorization.

6868644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572394 (or 572392 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 6868644 is about 2620.8097985165. The cubic root of 6868644 is about 190.0890072354.

Adding to 6868644 its sum of digits (42), we get a palindrome (6868686).

The spelling of 6868644 in words is "six million, eight hundred sixty-eight thousand, six hundred forty-four".