30445 has 4 divisors (see below), whose sum is σ = 36540. Its totient is φ = 24352.

The previous prime is 30431. The next prime is 30449. The reversal of 30445 is 54403.

30445 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8836 + 21609 = 94^2 + 147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30445 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30449) 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 3 ways as a sum of consecutive naturals, for example, 3040 + ... + 3049.

It is an arithmetic number, because the mean of its divisors is an integer number (9135).

2³⁰⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

30445 is a deficient number, since it is larger than the sum of its proper divisors (6095).

30445 is an equidigital number, since it uses as much as digits as its factorization.

30445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 30445 is about 174.4849563716. The cubic root of 30445 is about 31.2252070017.

Adding to 30445 its reverse (54403), we get a palindrome (84848).

The spelling of 30445 in words is "thirty thousand, four hundred forty-five".