685264320 has 224 divisors, whose sum is σ = 2603845440. Its totient is φ = 168652800.

The previous prime is 685264267. The next prime is 685264379. The reversal of 685264320 is 23462586.

685264320 is a `hidden beast` number, since 6 + 8 + 5 + 2 + 643 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109270 + ... + 115370.

It is an arithmetic number, because the mean of its divisors is an integer number (11624310).

Almost surely, 2^685264320 is an apocalyptic number.

685264320 is a gapful number since it is divisible by the number (60) 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 685264320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301922720).

685264320 is an abundant number, since it is smaller than the sum of its proper divisors (1918581120).

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

685264320 is a wasteful number, since it uses less digits than its factorization.

685264320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140 (or 6124 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 685264320 is about 26177.5537436178. The cubic root of 685264320 is about 881.6293504852.

It can be divided in two parts, 685264 and 320, that added together give a square (685584 = 828²).

The spelling of 685264320 in words is "six hundred eighty-five million, two hundred sixty-four thousand, three hundred twenty".