685785748 has 6 divisors (see below), whose sum is σ = 1200125066. Its totient is φ = 342892872.

The previous prime is 685785743. The next prime is 685785769. The reversal of 685785748 is 847587586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 683717904 + 2067844 = 26148^2 + 1438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685785692 and 685785701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685785743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85723215 + ... + 85723222.

Almost surely, 2^685785748 is an apocalyptic number.

It is an amenable number.

685785748 is a deficient number, since it is larger than the sum of its proper divisors (514339318).

685785748 is a wasteful number, since it uses less digits than its factorization.

685785748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171446441 (or 171446439 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 58.

The square root of 685785748 is about 26187.5112983269. The cubic root of 685785748 is about 881.8529088338.

The spelling of 685785748 in words is "six hundred eighty-five million, seven hundred eighty-five thousand, seven hundred forty-eight".