686223536 has 10 divisors (see below), whose sum is σ = 1329558132. Its totient is φ = 343111760.

The previous prime is 686223521. The next prime is 686223539. The reversal of 686223536 is 635322686.

It is a junction number, because it is equal to n+sod(n) for n = 686223493 and 686223502.

It is not an unprimeable number, because it can be changed into a prime (686223539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21444470 + ... + 21444501.

Almost surely, 2^686223536 is an apocalyptic number.

It is an amenable number.

686223536 is a deficient number, since it is larger than the sum of its proper divisors (643334596).

686223536 is a wasteful number, since it uses less digits than its factorization.

686223536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42888979 (or 42888973 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 686223536 is about 26195.8686819124. The cubic root of 686223536 is about 882.0405196633.

The spelling of 686223536 in words is "six hundred eighty-six million, two hundred twenty-three thousand, five hundred thirty-six".