684712 has 16 divisors (see below), whose sum is σ = 1467360. Its totient is φ = 293424.

The previous prime is 684683. The next prime is 684713. The reversal of 684712 is 217486.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (684713) 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, 6058 + ... + 6169.

It is an arithmetic number, because the mean of its divisors is an integer number (91710).

2⁶⁸⁴⁷¹² is an apocalyptic number.

It is an amenable number.

684712 is an abundant number, since it is smaller than the sum of its proper divisors (782648).

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

684712 is a wasteful number, since it uses less digits than its factorization.

684712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240 (or 12236 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 684712 is about 827.4732624079. The cubic root of 684712 is about 88.1392423706.

It can be divided in two parts, 6847 and 12, that added together give a cube (6859 = 19³).

The spelling of 684712 in words is "six hundred eighty-four thousand, seven hundred twelve".