685800008 has 8 divisors (see below), whose sum is σ = 1285875030. Its totient is φ = 342900000.

The previous prime is 685800001. The next prime is 685800013. The reversal of 685800008 is 800008586.

It can be written as a sum of positive squares in only one way, i.e., 659565124 + 26234884 = 25682^2 + 5122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (685800001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42862493 + ... + 42862508.

Almost surely, 2^685800008 is an apocalyptic number.

It is an amenable number.

685800008 is a deficient number, since it is larger than the sum of its proper divisors (600075022).

685800008 is a wasteful number, since it uses less digits than its factorization.

685800008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85725007 (or 85725003 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 685800008 is about 26187.7835640972. The cubic root of 685800008 is about 881.8590211098.

The spelling of 685800008 in words is "six hundred eighty-five million, eight hundred thousand, eight".