6856040 has 16 divisors (see below), whose sum is σ = 15426180. Its totient is φ = 2742400.

The previous prime is 6856039. The next prime is 6856051. The reversal of 6856040 is 406586.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 2116 = 2618^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6855994 and 6856012.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 85661 + ... + 85740.

Almost surely, 2^6856040 is an apocalyptic number.

It is an amenable number.

6856040 is an abundant number, since it is smaller than the sum of its proper divisors (8570140).

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

6856040 is a wasteful number, since it uses less digits than its factorization.

6856040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171412 (or 171408 counting only the distinct ones).

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

The square root of 6856040 is about 2618.4040941001. The cubic root of 6856040 is about 189.9726645808.

The spelling of 6856040 in words is "six million, eight hundred fifty-six thousand, forty".