686856422 has 24 divisors (see below), whose sum is σ = 1261576440. Its totient is φ = 278873280.

The previous prime is 686856421. The next prime is 686856461. The reversal of 686856422 is 224658686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686856421) 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, 182579 + ... + 186302.

It is an arithmetic number, because the mean of its divisors is an integer number (52565685).

Almost surely, 2^686856422 is an apocalyptic number.

686856422 is a deficient number, since it is larger than the sum of its proper divisors (574720018).

686856422 is a wasteful number, since it uses less digits than its factorization.

686856422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368916 (or 368909 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 686856422 is about 26207.9457798584. The cubic root of 686856422 is about 882.3115973034.

The spelling of 686856422 in words is "six hundred eighty-six million, eight hundred fifty-six thousand, four hundred twenty-two".