30120445 has 16 divisors (see below), whose sum is σ = 37220400. Its totient is φ = 23385600.

The previous prime is 30120439. The next prime is 30120449. The reversal of 30120445 is 54402103.

It can be written as a sum of positive squares in 8 ways, for example, as 9308601 + 20811844 = 3051^2 + 4562^2 .

It is not a de Polignac number, because 30120445 - 2¹¹ = 30118397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71335 + ... + 71755.

It is an arithmetic number, because the mean of its divisors is an integer number (2326275).

Almost surely, 2^30120445 is an apocalyptic number.

It is an amenable number.

30120445 is a deficient number, since it is larger than the sum of its proper divisors (7099955).

30120445 is a wasteful number, since it uses less digits than its factorization.

30120445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30120445 is about 5488.2096352089. The cubic root of 30120445 is about 311.1385293532.

Adding to 30120445 its reverse (54402103), we get a palindrome (84522548).

The spelling of 30120445 in words is "thirty million, one hundred twenty thousand, four hundred forty-five".