30708 has 18 divisors (see below), whose sum is σ = 77714. Its totient is φ = 10224.

The previous prime is 30707. The next prime is 30713. The reversal of 30708 is 80703.

It can be written as a sum of positive squares in only one way, i.e., 19044 + 11664 = 138^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391 + ... + 462.

2³⁰⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

30708 is an abundant number, since it is smaller than the sum of its proper divisors (47006).

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

30708 is a wasteful number, since it uses less digits than its factorization.

30708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 30708 is about 175.2369823981. The cubic root of 30708 is about 31.3148626111.

Adding to 30708 its product of nonzero digits (168), we get a triangular number (30876 = T₂₄₈).

The spelling of 30708 in words is "thirty thousand, seven hundred eight".