684038 has 16 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 316296.

The previous prime is 684037. The next prime is 684053. The reversal of 684038 is 830486.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 684038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2⁶⁸⁴⁰³⁸ is an apocalyptic number.

684038 is a deficient number, since it is larger than the sum of its proper divisors (421882).

684038 is a wasteful number, since it uses less digits than its factorization.

684038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 684038 is about 827.0658982209. The cubic root of 684038 is about 88.1103127611.

The spelling of 684038 in words is "six hundred eighty-four thousand, thirty-eight".