6810138 has 24 divisors (see below), whose sum is σ = 14807988. Its totient is φ = 2261952.

The previous prime is 6810131. The next prime is 6810143. The reversal of 6810138 is 8310186.

It can be written as a sum of positive squares in 2 ways, for example, as 6796449 + 13689 = 2607^2 + 117^2 .

It is not an unprimeable number, because it can be changed into a prime (6810131) 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 11 ways as a sum of consecutive naturals, for example, 6670 + ... + 7622.

Almost surely, 2^6810138 is an apocalyptic number.

6810138 is an abundant number, since it is smaller than the sum of its proper divisors (7997850).

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

6810138 is a wasteful number, since it uses less digits than its factorization.

6810138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 6810138 is about 2609.6241108635. The cubic root of 6810138 is about 189.5477517197.

The spelling of 6810138 in words is "six million, eight hundred ten thousand, one hundred thirty-eight".