685234368 has 336 divisors, whose sum is σ = 2562880320. Its totient is φ = 169869312.

The previous prime is 685234349. The next prime is 685234391. The reversal of 685234368 is 863432586.

It is a happy number.

685234368 is a `hidden beast` number, since 68 + 523 + 4 + 3 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×685234368² = 939092278176718848, which contains 22 as substring.

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, 890688 + ... + 891456.

It is an arithmetic number, because the mean of its divisors is an integer number (7627620).

Almost surely, 2^685234368 is an apocalyptic number.

685234368 is a gapful number since it is divisible by the number (68) 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 685234368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281440160).

685234368 is an abundant number, since it is smaller than the sum of its proper divisors (1877645952).

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

685234368 is a wasteful number, since it uses less digits than its factorization.

685234368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 811 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 685234368 is about 26176.9816441850. The cubic root of 685234368 is about 881.6165053459.

The spelling of 685234368 in words is "six hundred eighty-five million, two hundred thirty-four thousand, three hundred sixty-eight".