685725340 has 24 divisors (see below), whose sum is σ = 1440956160. Its totient is φ = 274112448.

The previous prime is 685725323. The next prime is 685725349. The reversal of 685725340 is 43527586.

It is a junction number, because it is equal to n+sod(n) for n = 685725293 and 685725302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685725349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23109 + ... + 43651.

It is an arithmetic number, because the mean of its divisors is an integer number (60039840).

Almost surely, 2^685725340 is an apocalyptic number.

It is an amenable number.

685725340 is an abundant number, since it is smaller than the sum of its proper divisors (755230820).

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

685725340 is a wasteful number, since it uses less digits than its factorization.

685725340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22221 (or 22219 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 685725340 is about 26186.3578987228. The cubic root of 685725340 is about 881.8270151613.

The spelling of 685725340 in words is "six hundred eighty-five million, seven hundred twenty-five thousand, three hundred forty".