686228686 has 24 divisors (see below), whose sum is σ = 1210079304. Its totient is φ = 287742240.

The previous prime is 686228671. The next prime is 686228687. The reversal of 686228686 is 686822686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686228687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442240 + ... + 443788.

It is an arithmetic number, because the mean of its divisors is an integer number (50419971).

Almost surely, 2^686228686 is an apocalyptic number.

686228686 is a deficient number, since it is larger than the sum of its proper divisors (523850618).

686228686 is a wasteful number, since it uses less digits than its factorization.

686228686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124 (or 1575 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The square root of 686228686 is about 26195.9669796707. The cubic root of 686228686 is about 882.0427261830.

The spelling of 686228686 in words is "six hundred eighty-six million, two hundred twenty-eight thousand, six hundred eighty-six".