30685 has 12 divisors (see below), whose sum is σ = 41148. Its totient is φ = 21888.

The previous prime is 30677. The next prime is 30689. The reversal of 30685 is 58603.

30685 is nontrivially palindromic in base 4.

30685 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17689 + 12996 = 133^2 + 114^2 .

It is not a de Polignac number, because 30685 - 2³ = 30677 is a prime.

It is a Duffinian number.

30685 is strictly pandigital in base 6.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1606 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (3429).

2³⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

30685 is a deficient number, since it is larger than the sum of its proper divisors (10463).

30685 is a wasteful number, since it uses less digits than its factorization.

30685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30685 is about 175.1713446886. The cubic root of 30685 is about 31.3070424803.

The spelling of 30685 in words is "thirty thousand, six hundred eighty-five".