685038 has 32 divisors (see below), whose sum is σ = 1474560. Its totient is φ = 211680.

The previous prime is 685031. The next prime is 685039. The reversal of 685038 is 830586.

It is a super-2 number, since 2×685038² = 938554122888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684996 and 685014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5331 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2⁶⁸⁵⁰³⁸ is an apocalyptic number.

685038 is an abundant number, since it is smaller than the sum of its proper divisors (789522).

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

685038 is a wasteful number, since it uses less digits than its factorization.

685038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 685038 is about 827.6702241835. The cubic root of 685038 is about 88.1532282187.

The spelling of 685038 in words is "six hundred eighty-five thousand, thirty-eight".