686123626 has 32 divisors (see below), whose sum is σ = 1097712000. Its totient is φ = 320939520.

The previous prime is 686123593. The next prime is 686123639. The reversal of 686123626 is 626321686.

It is a happy number.

686123626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653550 + ... + 654598.

It is an arithmetic number, because the mean of its divisors is an integer number (34303500).

Almost surely, 2^686123626 is an apocalyptic number.

686123626 is a deficient number, since it is larger than the sum of its proper divisors (411588374).

686123626 is a wasteful number, since it uses less digits than its factorization.

686123626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its digits is 124416, while the sum is 40.

The square root of 686123626 is about 26193.9616324068. The cubic root of 686123626 is about 881.9977109958.

The spelling of 686123626 in words is "six hundred eighty-six million, one hundred twenty-three thousand, six hundred twenty-six".