6856390 has 16 divisors (see below), whose sum is σ = 12551760. Its totient is φ = 2695840.

The previous prime is 6856387. The next prime is 6856391. The reversal of 6856390 is 936586.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856391) 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, 5221 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (784485).

Almost surely, 2^6856390 is an apocalyptic number.

6856390 is a deficient number, since it is larger than the sum of its proper divisors (5695370).

6856390 is a wasteful number, since it uses less digits than its factorization.

6856390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11687.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6856390 is about 2618.4709278508. The cubic root of 6856390 is about 189.9758972195.

The spelling of 6856390 in words is "six million, eight hundred fifty-six thousand, three hundred ninety".