684872 has 16 divisors (see below), whose sum is σ = 1306800. Its totient is φ = 336400.

The previous prime is 684869. The next prime is 684889. The reversal of 684872 is 278486.

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, 254 + ... + 1197.

It is an arithmetic number, because the mean of its divisors is an integer number (81675).

2⁶⁸⁴⁸⁷² is an apocalyptic number.

It is an amenable number.

684872 is a deficient number, since it is larger than the sum of its proper divisors (621928).

684872 is a wasteful number, since it uses less digits than its factorization.

684872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1512 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 684872 is about 827.5699366217. The cubic root of 684872 is about 88.1461071451.

The spelling of 684872 in words is "six hundred eighty-four thousand, eight hundred seventy-two".