6840688 has 20 divisors (see below), whose sum is σ = 13318840. Its totient is φ = 3403584.

The previous prime is 6840661. The next prime is 6840721. The reversal of 6840688 is 8860486.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6840688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731 + ... + 4597.

It is an arithmetic number, because the mean of its divisors is an integer number (665942).

Almost surely, 2^6840688 is an apocalyptic number.

It is an amenable number.

6840688 is a deficient number, since it is larger than the sum of its proper divisors (6478152).

6840688 is a wasteful number, since it uses less digits than its factorization.

6840688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 6840688 is about 2615.4708945045. The cubic root of 6840688 is about 189.8307634300.

The spelling of 6840688 in words is "six million, eight hundred forty thousand, six hundred eighty-eight".