30845 has 8 divisors (see below), whose sum is σ = 38400. Its totient is φ = 23760.

The previous prime is 30841. The next prime is 30851. The reversal of 30845 is 54803.

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

It is not a de Polignac number, because 30845 - 2² = 30841 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 254.

It is an arithmetic number, because the mean of its divisors is an integer number (4800).

2³⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

30845 is a deficient number, since it is larger than the sum of its proper divisors (7555).

30845 is a wasteful number, since it uses less digits than its factorization.

30845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 30845 is about 175.6274466022. The cubic root of 30845 is about 31.3613626759.

It can be divided in two parts, 308 and 45, that added together give a palindrome (353).

The spelling of 30845 in words is "thirty thousand, eight hundred forty-five".