685808948 has 12 divisors (see below), whose sum is σ = 1309271712. Its totient is φ = 311731320.

The previous prime is 685808941. The next prime is 685808957. The reversal of 685808948 is 849808586.

It is a junction number, because it is equal to n+sod(n) for n = 685808893 and 685808902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685808941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7793240 + ... + 7793327.

It is an arithmetic number, because the mean of its divisors is an integer number (109105976).

Almost surely, 2^685808948 is an apocalyptic number.

It is an amenable number.

685808948 is a deficient number, since it is larger than the sum of its proper divisors (623462764).

685808948 is a wasteful number, since it uses less digits than its factorization.

685808948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586582 (or 15586580 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 56.

The square root of 685808948 is about 26187.9542538168. The cubic root of 685808948 is about 881.8628530264.

The spelling of 685808948 in words is "six hundred eighty-five million, eight hundred eight thousand, nine hundred forty-eight".