685018 has 8 divisors (see below), whose sum is σ = 1055412. Its totient is φ = 333216.

The previous prime is 685001. The next prime is 685019. The reversal of 685018 is 810586.

It is a happy number.

685018 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 683929 + 1089 = 827^2 + 33^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×685018³ = 964333391447477496, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (685019) 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, 4555 + ... + 4702.

2⁶⁸⁵⁰¹⁸ is an apocalyptic number.

685018 is a deficient number, since it is larger than the sum of its proper divisors (370394).

685018 is a wasteful number, since it uses less digits than its factorization.

685018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9296.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 685018 is about 827.6581419886. The cubic root of 685018 is about 88.1523703190.

The spelling of 685018 in words is "six hundred eighty-five thousand, eighteen".