685743140 has 12 divisors (see below), whose sum is σ = 1440060636. Its totient is φ = 274297248.

The previous prime is 685743101. The next prime is 685743169. The reversal of 685743140 is 41347586.

685743140 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 259403236 + 426339904 = 16106^2 + 20648^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685743094 and 685743103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17143559 + ... + 17143598.

It is an arithmetic number, because the mean of its divisors is an integer number (120005053).

Almost surely, 2^685743140 is an apocalyptic number.

It is an amenable number.

685743140 is an abundant number, since it is smaller than the sum of its proper divisors (754317496).

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

685743140 is a wasteful number, since it uses less digits than its factorization.

685743140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34287166 (or 34287164 counting only the distinct ones).

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

The square root of 685743140 is about 26186.6977681417. The cubic root of 685743140 is about 881.8346452254.

The spelling of 685743140 in words is "six hundred eighty-five million, seven hundred forty-three thousand, one hundred forty".