686428846 has 24 divisors (see below), whose sum is σ = 1119984840. Its totient is φ = 314645040.

The previous prime is 686428829. The next prime is 686428871. The reversal of 686428846 is 648824686.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 686428793 and 686428802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27120 + ... + 45916.

It is an arithmetic number, because the mean of its divisors is an integer number (46666035).

Almost surely, 2^686428846 is an apocalyptic number.

686428846 is a deficient number, since it is larger than the sum of its proper divisors (433555994).

686428846 is a wasteful number, since it uses less digits than its factorization.

686428846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18880 (or 18849 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 52.

The square root of 686428846 is about 26199.7871365399. The cubic root of 686428846 is about 882.1284762704.

The spelling of 686428846 in words is "six hundred eighty-six million, four hundred twenty-eight thousand, eight hundred forty-six".