685264208 has 40 divisors (see below), whose sum is σ = 1406154048. Its totient is φ = 322831872.

The previous prime is 685264199. The next prime is 685264243. The reversal of 685264208 is 802462586.

It is a congruent number.

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, 10760 + ... + 38552.

Almost surely, 2^685264208 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 685264208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703077024).

685264208 is an abundant number, since it is smaller than the sum of its proper divisors (720889840).

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

685264208 is a wasteful number, since it uses less digits than its factorization.

685264208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27891 (or 27885 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 685264208 is about 26177.5516043804. The cubic root of 685264208 is about 881.6293024539.

The spelling of 685264208 in words is "six hundred eighty-five million, two hundred sixty-four thousand, two hundred eight".