6787138 has 8 divisors (see below), whose sum is σ = 10237500. Its totient is φ = 3374640.

The previous prime is 6787133. The next prime is 6787141. The reversal of 6787138 is 8317876.

It can be written as a sum of positive squares in 2 ways, for example, as 6315169 + 471969 = 2513^2 + 687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 6787138.

It is not an unprimeable number, because it can be changed into a prime (6787133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9013 + ... + 9736.

Almost surely, 2^6787138 is an apocalyptic number.

6787138 is a deficient number, since it is larger than the sum of its proper divisors (3450362).

6787138 is a wasteful number, since it uses less digits than its factorization.

6787138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18932.

The product of its digits is 56448, while the sum is 40.

The square root of 6787138 is about 2605.2136188804. The cubic root of 6787138 is about 189.3341233794.

The spelling of 6787138 in words is "six million, seven hundred eighty-seven thousand, one hundred thirty-eight".