6831220 has 24 divisors (see below), whose sum is σ = 15650208. Its totient is φ = 2484000.

The previous prime is 6831173. The next prime is 6831221. The reversal of 6831220 is 221386.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 6831191 and 6831200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6831221) 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, 15306 + ... + 15745.

It is an arithmetic number, because the mean of its divisors is an integer number (652092).

Almost surely, 2^6831220 is an apocalyptic number.

It is an amenable number.

6831220 is an abundant number, since it is smaller than the sum of its proper divisors (8818988).

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

6831220 is a wasteful number, since it uses less digits than its factorization.

6831220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31071 (or 31069 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 6831220 is about 2613.6602686654. The cubic root of 6831220 is about 189.7431432222.

The spelling of 6831220 in words is "six million, eight hundred thirty-one thousand, two hundred twenty".