684572 has 24 divisors (see below), whose sum is σ = 1430016. Its totient is φ = 280368.

The previous prime is 684569. The next prime is 684581. The reversal of 684572 is 275486.

It is a congruent number.

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, 113 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (59584).

2⁶⁸⁴⁵⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715008).

684572 is an abundant number, since it is smaller than the sum of its proper divisors (745444).

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

684572 is a wasteful number, since it uses less digits than its factorization.

684572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1095 counting only the distinct ones).

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

The square root of 684572 is about 827.3886632049. The cubic root of 684572 is about 88.1332348155.

The spelling of 684572 in words is "six hundred eighty-four thousand, five hundred seventy-two".