6818420 has 48 divisors (see below), whose sum is σ = 16547328. Its totient is φ = 2311680.

The previous prime is 6818407. The next prime is 6818429. The reversal of 6818420 is 248186.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15605 + ... + 16035.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

Almost surely, 2^6818420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6818420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8273664).

6818420 is an abundant number, since it is smaller than the sum of its proper divisors (9728908).

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

6818420 is a wasteful number, since it uses less digits than its factorization.

6818420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 6818420 is about 2611.2104472830. The cubic root of 6818420 is about 189.6245587064.

The spelling of 6818420 in words is "six million, eight hundred eighteen thousand, four hundred twenty".