685264672 has 48 divisors (see below), whose sum is σ = 1397716992. Its totient is φ = 330370560.

The previous prime is 685264669. The next prime is 685264681. The reversal of 685264672 is 276462586.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309393 + ... + 311599.

It is an arithmetic number, because the mean of its divisors is an integer number (29119104).

Almost surely, 2^685264672 is an apocalyptic number.

685264672 is a gapful number since it is divisible by the number (62) 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 685264672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698858496).

685264672 is an abundant number, since it is smaller than the sum of its proper divisors (712452320).

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

685264672 is a wasteful number, since it uses less digits than its factorization.

685264672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2553 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 685264672 is about 26177.5604669343. The cubic root of 685264672 is about 881.6295014408.

The spelling of 685264672 in words is "six hundred eighty-five million, two hundred sixty-four thousand, six hundred seventy-two".