6817940 has 12 divisors (see below), whose sum is σ = 14317716. Its totient is φ = 2727168.

The previous prime is 6817927. The next prime is 6817949. The reversal of 6817940 is 497186.

It can be written as a sum of positive squares in 2 ways, for example, as 3818116 + 2999824 = 1954^2 + 1732^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6817940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6817949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170429 + ... + 170468.

It is an arithmetic number, because the mean of its divisors is an integer number (1193143).

Almost surely, 2^6817940 is an apocalyptic number.

It is an amenable number.

6817940 is an abundant number, since it is smaller than the sum of its proper divisors (7499776).

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

6817940 is a wasteful number, since it uses less digits than its factorization.

6817940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340906 (or 340904 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 6817940 is about 2611.1185342684. The cubic root of 6817940 is about 189.6201089011.

The spelling of 6817940 in words is "six million, eight hundred seventeen thousand, nine hundred forty".