6806540 has 48 divisors (see below), whose sum is σ = 15748992. Its totient is φ = 2455296.

The previous prime is 6806539. The next prime is 6806543. The reversal of 6806540 is 456086.

It is not an unprimeable number, because it can be changed into a prime (6806543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11942 + ... + 12498.

It is an arithmetic number, because the mean of its divisors is an integer number (328104).

Almost surely, 2^6806540 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 6806540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7874496).

6806540 is an abundant number, since it is smaller than the sum of its proper divisors (8942452).

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

6806540 is a wasteful number, since it uses less digits than its factorization.

6806540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 6806540 is about 2608.9346484724. The cubic root of 6806540 is about 189.5143645866.

The spelling of 6806540 in words is "six million, eight hundred six thousand, five hundred forty".