6878786 has 4 divisors (see below), whose sum is σ = 10318182. Its totient is φ = 3439392.

The previous prime is 6878777. The next prime is 6878789.

It is a happy number.

6878786 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 1142761 = 2395^2 + 1069^2 .

It is not an unprimeable number, because it can be changed into a prime (6878789) 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 as a sum of consecutive naturals, namely, 1719695 + ... + 1719698.

Almost surely, 2^6878786 is an apocalyptic number.

6878786 is a deficient number, since it is larger than the sum of its proper divisors (3439396).

6878786 is a wasteful number, since it uses less digits than its factorization.

6878786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439395.

The product of its digits is 903168, while the sum is 50.

The square root of 6878786 is about 2622.7439829309. The cubic root of 6878786 is about 190.1825208220.

The spelling of 6878786 in words is "six million, eight hundred seventy-eight thousand, seven hundred eighty-six".