685472 has 24 divisors (see below), whose sum is σ = 1395072. Its totient is φ = 331200.

The previous prime is 685471. The next prime is 685493. The reversal of 685472 is 274586.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685472.

It is not an unprimeable number, because it can be changed into a prime (685471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647 + ... + 1337.

It is an arithmetic number, because the mean of its divisors is an integer number (58128).

2⁶⁸⁵⁴⁷² is an apocalyptic number.

685472 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 685472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697536).

685472 is an abundant number, since it is smaller than the sum of its proper divisors (709600).

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

685472 is a wasteful number, since it uses less digits than its factorization.

685472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 724 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 685472 is about 827.9323643873. The cubic root of 685472 is about 88.1718405314.

The spelling of 685472 in words is "six hundred eighty-five thousand, four hundred seventy-two".