6856878 has 16 divisors (see below), whose sum is σ = 15672960. Its totient is φ = 1959096.

The previous prime is 6856873. The next prime is 6856897. The reversal of 6856878 is 8786586.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81588 + ... + 81671.

It is an arithmetic number, because the mean of its divisors is an integer number (979560).

Almost surely, 2^6856878 is an apocalyptic number.

6856878 is an abundant number, since it is smaller than the sum of its proper divisors (8816082).

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

6856878 is a wasteful number, since it uses less digits than its factorization.

6856878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163271.

The product of its digits is 645120, while the sum is 48.

The square root of 6856878 is about 2618.5641103475. The cubic root of 6856878 is about 189.9804042579.

The spelling of 6856878 in words is "six million, eight hundred fifty-six thousand, eight hundred seventy-eight".