685134444 has 24 divisors (see below), whose sum is σ = 1599575040. Its totient is φ = 228245584.

The previous prime is 685134421. The next prime is 685134449. The reversal of 685134444 is 444431586.

It is not an unprimeable number, because it can be changed into a prime (685134449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6217 + ... + 37535.

It is an arithmetic number, because the mean of its divisors is an integer number (66648960).

Almost surely, 2^685134444 is an apocalyptic number.

It is an amenable number.

685134444 is an abundant number, since it is smaller than the sum of its proper divisors (914440596).

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

685134444 is a wasteful number, since it uses less digits than its factorization.

685134444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33149 (or 33147 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 685134444 is about 26175.0729511877. The cubic root of 685134444 is about 881.5736494831.

The spelling of 685134444 in words is "six hundred eighty-five million, one hundred thirty-four thousand, four hundred forty-four".