685028736 has 384 divisors, whose sum is σ = 2520460800. Its totient is φ = 173850624.

The previous prime is 685028629. The next prime is 685028741. The reversal of 685028736 is 637820586.

685028736 is a `hidden beast` number, since 68 + 502 + 87 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a junction number, because it is equal to n+sod(n) for n = 685028691 and 685028700.

It is a congruent number.

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, 2604541 + ... + 2604803.

It is an arithmetic number, because the mean of its divisors is an integer number (6563700).

Almost surely, 2^685028736 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 685028736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260230400).

685028736 is an abundant number, since it is smaller than the sum of its proper divisors (1835432064).

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

685028736 is a wasteful number, since it uses less digits than its factorization.

685028736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 685028736 is about 26173.0536239087. The cubic root of 685028736 is about 881.5283084160.

The spelling of 685028736 in words is "six hundred eighty-five million, twenty-eight thousand, seven hundred thirty-six".