685064736 has 192 divisors, whose sum is σ = 2080391040. Its totient is φ = 219156480.

The previous prime is 685064717. The next prime is 685064789. The reversal of 685064736 is 637460586.

It is a junction number, because it is equal to n+sod(n) for n = 685064691 and 685064700.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2940076 + ... + 2940308.

It is an arithmetic number, because the mean of its divisors is an integer number (10835370).

Almost surely, 2^685064736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685064736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040195520).

685064736 is an abundant number, since it is smaller than the sum of its proper divisors (1395326304).

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

685064736 is a wasteful number, since it uses less digits than its factorization.

685064736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 685064736 is about 26173.7413450962. The cubic root of 685064736 is about 881.5437503294.

The spelling of 685064736 in words is "six hundred eighty-five million, sixty-four thousand, seven hundred thirty-six".