684016 has 10 divisors (see below), whose sum is σ = 1325312. Its totient is φ = 342000.

The previous prime is 684007. The next prime is 684017. The reversal of 684016 is 610486.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21360 + ... + 21391.

2⁶⁸⁴⁰¹⁶ is an apocalyptic number.

It is an amenable number.

684016 is a deficient number, since it is larger than the sum of its proper divisors (641296).

684016 is a wasteful number, since it uses less digits than its factorization.

684016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42759 (or 42753 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 684016 is about 827.0525980855. The cubic root of 684016 is about 88.1093681510.

The spelling of 684016 in words is "six hundred eighty-four thousand, sixteen".