685604810 has 16 divisors (see below), whose sum is σ = 1346278752. Its totient is φ = 249310800.

The previous prime is 685604789. The next prime is 685604813. The reversal of 685604810 is 18406586.

It is a super-2 number, since 2×685604810² = 940107910990272200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (685604813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3116276 + ... + 3116495.

It is an arithmetic number, because the mean of its divisors is an integer number (84142422).

Almost surely, 2^685604810 is an apocalyptic number.

685604810 is a deficient number, since it is larger than the sum of its proper divisors (660673942).

685604810 is a wasteful number, since it uses less digits than its factorization.

685604810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232789.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 685604810 is about 26184.0564084330. The cubic root of 685604810 is about 881.7753458646.

The spelling of 685604810 in words is "six hundred eighty-five million, six hundred four thousand, eight hundred ten".