686443692 has 24 divisors (see below), whose sum is σ = 1747311552. Its totient is φ = 208013200.

The previous prime is 686443669. The next prime is 686443829. The reversal of 686443692 is 296344686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600034 + ... + 2600297.

It is an arithmetic number, because the mean of its divisors is an integer number (72804648).

Almost surely, 2^686443692 is an apocalyptic number.

It is an amenable number.

686443692 is an abundant number, since it is smaller than the sum of its proper divisors (1060867860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686443692 is a wasteful number, since it uses less digits than its factorization.

686443692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200349 (or 5200347 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 686443692 is about 26200.0704579205. The cubic root of 686443692 is about 882.1348357472.

The spelling of 686443692 in words is "six hundred eighty-six million, four hundred forty-three thousand, six hundred ninety-two".