6840220 has 24 divisors (see below), whose sum is σ = 14482944. Its totient is φ = 2713536.

The previous prime is 6840203. The next prime is 6840221. The reversal of 6840220 is 220486.

It is a junction number, because it is equal to n+sod(n) for n = 6840191 and 6840200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (603456).

Almost surely, 2^6840220 is an apocalyptic number.

It is an amenable number.

6840220 is an abundant number, since it is smaller than the sum of its proper divisors (7642724).

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

6840220 is a wasteful number, since it uses less digits than its factorization.

6840220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2827 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 6840220 is about 2615.3814253374. The cubic root of 6840220 is about 189.8264342931.

The spelling of 6840220 in words is "six million, eight hundred forty thousand, two hundred twenty".