6818238 has 48 divisors (see below), whose sum is σ = 17218656. Its totient is φ = 1909440.

The previous prime is 6818221. The next prime is 6818239. The reversal of 6818238 is 8328186.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818239) 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 23 ways as a sum of consecutive naturals, for example, 6168 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (358722).

Almost surely, 2^6818238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6818238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8609328).

6818238 is an abundant number, since it is smaller than the sum of its proper divisors (10400418).

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

6818238 is a wasteful number, since it uses less digits than its factorization.

6818238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1086 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 6818238 is about 2611.1755973124. The cubic root of 6818238 is about 189.6228715132.

It can be divided in two parts, 6818 and 238, that added together give a square (7056 = 84²).

The spelling of 6818238 in words is "six million, eight hundred eighteen thousand, two hundred thirty-eight".