685709548 has 24 divisors (see below), whose sum is σ = 1224030528. Its totient is φ = 336001536.

The previous prime is 685709539. The next prime is 685709561. The reversal of 685709548 is 845907586.

It is a junction number, because it is equal to n+sod(n) for n = 685709495 and 685709504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300540 + ... + 302812.

It is an arithmetic number, because the mean of its divisors is an integer number (51001272).

Almost surely, 2^685709548 is an apocalyptic number.

It is an amenable number.

685709548 is a deficient number, since it is larger than the sum of its proper divisors (538320980).

685709548 is a wasteful number, since it uses less digits than its factorization.

685709548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753 (or 3751 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The square root of 685709548 is about 26186.0563659364. The cubic root of 685709548 is about 881.8202457264.

The spelling of 685709548 in words is "six hundred eighty-five million, seven hundred nine thousand, five hundred forty-eight".