30405405 has 16 divisors (see below), whose sum is σ = 48962304. Its totient is φ = 16111680.

The previous prime is 30405391. The next prime is 30405421. The reversal of 30405405 is 50450403.

It is a happy number.

It is not a de Polignac number, because 30405405 - 2¹⁵ = 30372637 is a prime.

30405405 is a modest number, since divided by 405405 gives 30 as remainder.

It is a congruent number.

It is an unprimeable number.

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, 4101 + ... + 8810.

It is an arithmetic number, because the mean of its divisors is an integer number (3060144).

Almost surely, 2^30405405 is an apocalyptic number.

It is an amenable number.

30405405 is a deficient number, since it is larger than the sum of its proper divisors (18556899).

30405405 is a wasteful number, since it uses less digits than its factorization.

30405405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13076.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 30405405 is about 5514.1096289428. The cubic root of 30405405 is about 312.1166456519.

Adding to 30405405 its reverse (50450403), we get a palindrome (80855808).

The spelling of 30405405 in words is "thirty million, four hundred five thousand, four hundred five".