685610744 has 192 divisors, whose sum is σ = 1736128800. Its totient is φ = 250822656.

The previous prime is 685610741. The next prime is 685610747. The reversal of 685610744 is 447016586.

It is an interprime number because it is at equal distance from previous prime (685610741) and next prime (685610747).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685610741) 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 47 ways as a sum of consecutive naturals, for example, 7068104 + ... + 7068200.

Almost surely, 2^685610744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685610744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868064400).

685610744 is an abundant number, since it is smaller than the sum of its proper divisors (1050518056).

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

685610744 is a wasteful number, since it uses less digits than its factorization.

685610744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 685610744 is about 26184.1697214176. The cubic root of 685610744 is about 881.7778898179. Note that the first 3 decimals are identical.

The spelling of 685610744 in words is "six hundred eighty-five million, six hundred ten thousand, seven hundred forty-four".