685749250 has 32 divisors (see below), whose sum is σ = 1287756288. Its totient is φ = 273438000.

The previous prime is 685749199. The next prime is 685749263. The reversal of 685749250 is 52947586.

It is a self number, because there is not a number n which added to its sum of digits gives 685749250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78607 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (40242384).

Almost surely, 2^685749250 is an apocalyptic number.

685749250 is a deficient number, since it is larger than the sum of its proper divisors (602007038).

685749250 is a wasteful number, since it uses less digits than its factorization.

685749250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8635 (or 8625 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 685749250 is about 26186.8144301669. The cubic root of 685749250 is about 881.8372642788.

The spelling of 685749250 in words is "six hundred eighty-five million, seven hundred forty-nine thousand, two hundred fifty".