685534824 has 192 divisors, whose sum is σ = 2068684800. Its totient is φ = 203793408.

The previous prime is 685534813. The next prime is 685534831. The reversal of 685534824 is 428435586.

685534824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 685534824.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5397849 + ... + 5397975.

It is an arithmetic number, because the mean of its divisors is an integer number (10774400).

Almost surely, 2^685534824 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 685534824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034342400).

685534824 is an abundant number, since it is smaller than the sum of its proper divisors (1383149976).

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

685534824 is a wasteful number, since it uses less digits than its factorization.

685534824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 297 counting only the distinct ones).

The product of its digits is 921600, while the sum is 45.

The square root of 685534824 is about 26182.7199503795. The cubic root of 685534824 is about 881.7453411989.

The spelling of 685534824 in words is "six hundred eighty-five million, five hundred thirty-four thousand, eight hundred twenty-four".