30440145 has 16 divisors (see below), whose sum is σ = 48773952. Its totient is φ = 16211520.

The previous prime is 30440141. The next prime is 30440191. The reversal of 30440145 is 54104403.

It is not a de Polignac number, because 30440145 - 2² = 30440141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30440141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16699 + ... + 18431.

It is an arithmetic number, because the mean of its divisors is an integer number (3048372).

Almost surely, 2^30440145 is an apocalyptic number.

It is an amenable number.

30440145 is a deficient number, since it is larger than the sum of its proper divisors (18333807).

30440145 is a wasteful number, since it uses less digits than its factorization.

30440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 30440145 is about 5517.2588302526. The cubic root of 30440145 is about 312.2354710747.

Adding to 30440145 its reverse (54104403), we get a palindrome (84544548).

The spelling of 30440145 in words is "thirty million, four hundred forty thousand, one hundred forty-five".