686685052 has 24 divisors (see below), whose sum is σ = 1223657792. Its totient is φ = 337089600.

The previous prime is 686685031. The next prime is 686685053. The reversal of 686685052 is 250586686.

It is a junction number, because it is equal to n+sod(n) for n = 686684993 and 686685011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686685053) 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, 147277 + ... + 151867.

Almost surely, 2^686685052 is an apocalyptic number.

It is an amenable number.

686685052 is a deficient number, since it is larger than the sum of its proper divisors (536972740).

686685052 is a wasteful number, since it uses less digits than its factorization.

686685052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269 (or 5267 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 686685052 is about 26204.6761475886. The cubic root of 686685052 is about 882.2382125754.

The spelling of 686685052 in words is "six hundred eighty-six million, six hundred eighty-five thousand, fifty-two".