685741878 has 24 divisors (see below), whose sum is σ = 1513809648. Its totient is φ = 224267472.

The previous prime is 685741867. The next prime is 685741957. The reversal of 685741878 is 878147586.

It is a happy number.

685741878 is a `hidden beast` number, since 68 + 574 + 1 + 8 + 7 + 8 = 666.

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, 358450 + ... + 360357.

It is an arithmetic number, because the mean of its divisors is an integer number (63075402).

Almost surely, 2^685741878 is an apocalyptic number.

685741878 is an abundant number, since it is smaller than the sum of its proper divisors (828067770).

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

685741878 is a wasteful number, since it uses less digits than its factorization.

685741878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718868 (or 718865 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The square root of 685741878 is about 26186.6736719271. The cubic root of 685741878 is about 881.8341042668.

The spelling of 685741878 in words is "six hundred eighty-five million, seven hundred forty-one thousand, eight hundred seventy-eight".