685244324 has 12 divisors (see below), whose sum is σ = 1200893148. Its totient is φ = 342132000.

The previous prime is 685244323. The next prime is 685244333. The reversal of 685244324 is 423442586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 509946724 + 175297600 = 22582^2 + 13240^2 .

It is not an unprimeable number, because it can be changed into a prime (685244323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119387 + ... + 124994.

It is an arithmetic number, because the mean of its divisors is an integer number (100074429).

Almost surely, 2^685244324 is an apocalyptic number.

It is an amenable number.

685244324 is a deficient number, since it is larger than the sum of its proper divisors (515648824).

685244324 is a wasteful number, since it uses less digits than its factorization.

685244324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245086 (or 245084 counting only the distinct ones).

The product of its digits is 184320, while the sum is 38.

The square root of 685244324 is about 26177.1718105681. The cubic root of 685244324 is about 881.6207750925.

The spelling of 685244324 in words is "six hundred eighty-five million, two hundred forty-four thousand, three hundred twenty-four".