6807640 has 64 divisors (see below), whose sum is σ = 17962560. Its totient is φ = 2273280.

The previous prime is 6807637. The next prime is 6807641. The reversal of 6807640 is 467086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6807641) 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 15 ways as a sum of consecutive naturals, for example, 11184 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (280665).

Almost surely, 2^6807640 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 6807640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8981280).

6807640 is an abundant number, since it is smaller than the sum of its proper divisors (11154920).

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

6807640 is a wasteful number, since it uses less digits than its factorization.

6807640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 6807640 is about 2609.1454539753. The cubic root of 6807640 is about 189.5245731298.

It can be divided in two parts, 6807 and 640, that added together give a palindrome (7447).

The spelling of 6807640 in words is "six million, eight hundred seven thousand, six hundred forty".