685750464 has 168 divisors, whose sum is σ = 2289474720. Its totient is φ = 192172032.

The previous prime is 685750453. The next prime is 685750469. The reversal of 685750464 is 464057586.

685750464 is a `hidden beast` number, since 6 + 85 + 7 + 504 + 64 = 666.

685750464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (685750469) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212092 + ... + 215300.

Almost surely, 2^685750464 is an apocalyptic number.

685750464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685750464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144737360).

685750464 is an abundant number, since it is smaller than the sum of its proper divisors (1603724256).

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

685750464 is a wasteful number, since it uses less digits than its factorization.

685750464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287 (or 3274 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 685750464 is about 26186.8376097611. The cubic root of 685750464 is about 881.8377846584.

The spelling of 685750464 in words is "six hundred eighty-five million, seven hundred fifty thousand, four hundred sixty-four".