6856220 has 24 divisors (see below), whose sum is σ = 16455264. Its totient is φ = 2350656.

The previous prime is 6856189. The next prime is 6856229. The reversal of 6856220 is 226586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24347 + ... + 24626.

It is an arithmetic number, because the mean of its divisors is an integer number (685636).

Almost surely, 2^6856220 is an apocalyptic number.

It is an amenable number.

6856220 is an abundant number, since it is smaller than the sum of its proper divisors (9599044).

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

6856220 is a wasteful number, since it uses less digits than its factorization.

6856220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48989 (or 48987 counting only the distinct ones).

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

The square root of 6856220 is about 2618.4384659564. The cubic root of 6856220 is about 189.9743270945.

The spelling of 6856220 in words is "six million, eight hundred fifty-six thousand, two hundred twenty".