6816940 has 48 divisors (see below), whose sum is σ = 15607872. Its totient is φ = 2486016.

The previous prime is 6816937. The next prime is 6816967. The reversal of 6816940 is 496186.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 6816896 and 6816905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40737 + ... + 40903.

It is an arithmetic number, because the mean of its divisors is an integer number (325164).

Almost surely, 2^6816940 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 6816940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7803936).

6816940 is an abundant number, since it is smaller than the sum of its proper divisors (8790932).

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

6816940 is a wasteful number, since it uses less digits than its factorization.

6816940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6816940 is about 2610.9270384291. The cubic root of 6816940 is about 189.6108378026.

The spelling of 6816940 in words is "six million, eight hundred sixteen thousand, nine hundred forty".