685226736 has 80 divisors (see below), whose sum is σ = 1970980000. Its totient is φ = 227930112.

The previous prime is 685226693. The next prime is 685226743. The reversal of 685226736 is 637622586.

It is a happy number.

685226736 is a `hidden beast` number, since 68 + 522 + 67 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 685226691 and 685226700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247890 + ... + 250638.

It is an arithmetic number, because the mean of its divisors is an integer number (24637250).

Almost surely, 2^685226736 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 685226736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985490000).

685226736 is an abundant number, since it is smaller than the sum of its proper divisors (1285753264).

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

685226736 is a wasteful number, since it uses less digits than its factorization.

685226736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343 (or 3331 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 685226736 is about 26176.8358668499. The cubic root of 685226736 is about 881.6132322457.

The spelling of 685226736 in words is "six hundred eighty-five million, two hundred twenty-six thousand, seven hundred thirty-six".