685406748 has 48 divisors (see below), whose sum is σ = 1823623200. Its totient is φ = 198488064.

The previous prime is 685406723. The next prime is 685406773. The reversal of 685406748 is 847604586.

685406748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (685406723) and next prime (685406773).

It is a junction number, because it is equal to n+sod(n) for n = 685406697 and 685406706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126573 + ... + 131876.

It is an arithmetic number, because the mean of its divisors is an integer number (37992150).

Almost surely, 2^685406748 is an apocalyptic number.

685406748 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

685406748 is an abundant number, since it is smaller than the sum of its proper divisors (1138216452).

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

685406748 is a wasteful number, since it uses less digits than its factorization.

685406748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258486 (or 258484 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 685406748 is about 26180.2740245399. The cubic root of 685406748 is about 881.6904266777.

The spelling of 685406748 in words is "six hundred eighty-five million, four hundred six thousand, seven hundred forty-eight".