685419786 has 16 divisors (see below), whose sum is σ = 1523155200. Its totient is φ = 228473244.

The previous prime is 685419773. The next prime is 685419799. The reversal of 685419786 is 687914586.

685419786 is a `hidden beast` number, since 6 + 8 + 541 + 97 + 8 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (685419773) and next prime (685419799).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 12692959 = 685419786 / (6 + 8 + 5 + 4 + 1 + 9 + 7 + 8 + 6).

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, 6346426 + ... + 6346533.

It is an arithmetic number, because the mean of its divisors is an integer number (95197200).

Almost surely, 2^685419786 is an apocalyptic number.

685419786 is an abundant number, since it is smaller than the sum of its proper divisors (837735414).

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

685419786 is a wasteful number, since it uses less digits than its factorization.

685419786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692970 (or 12692964 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 685419786 is about 26180.5230276249. The cubic root of 685419786 is about 881.6960172301.

The spelling of 685419786 in words is "six hundred eighty-five million, four hundred nineteen thousand, seven hundred eighty-six".