685726400 has 42 divisors (see below), whose sum is σ = 1687319460. Its totient is φ = 274289920.

The previous prime is 685726387. The next prime is 685726403. The reversal of 685726400 is 4627586.

It is a happy number.

685726400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (685726403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212690 + ... + 215889.

Almost surely, 2^685726400 is an apocalyptic number.

It is an amenable number.

685726400 is an abundant number, since it is smaller than the sum of its proper divisors (1001593060).

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

685726400 is a wasteful number, since it uses less digits than its factorization.

685726400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428601 (or 428586 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 685726400 is about 26186.3781382611. The cubic root of 685726400 is about 881.8274695396.

The spelling of 685726400 in words is "six hundred eighty-five million, seven hundred twenty-six thousand, four hundred".