685448 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 335248.

The previous prime is 685429. The next prime is 685453. The reversal of 685448 is 844586.

685448 = 97² + 98² + ... + 143².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2⁶⁸⁵⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

685448 is a deficient number, since it is larger than the sum of its proper divisors (627832).

685448 is a wasteful number, since it uses less digits than its factorization.

685448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1872 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 685448 is about 827.9178703229. The cubic root of 685448 is about 88.1708114843.

The spelling of 685448 in words is "six hundred eighty-five thousand, four hundred forty-eight".