7868686 has 16 divisors (see below), whose sum is σ = 13955040. Its totient is φ = 3255840.

The previous prime is 7868677. The next prime is 7868687. The reversal of 7868686 is 6868687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9285 + ... + 10096.

It is an arithmetic number, because the mean of its divisors is an integer number (872190).

Almost surely, 2^7868686 is an apocalyptic number.

7868686 is a deficient number, since it is larger than the sum of its proper divisors (6086354).

7868686 is a wasteful number, since it uses less digits than its factorization.

7868686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19419.

The product of its digits is 774144, while the sum is 49.

The square root of 7868686 is about 2805.1178228374. The cubic root of 7868686 is about 198.8996741837.

Subtracting from 7868686 its reverse (6868687), we obtain a palindrome (999999).

The spelling of 7868686 in words is "seven million, eight hundred sixty-eight thousand, six hundred eighty-six".