30430905 has 16 divisors (see below), whose sum is σ = 48761664. Its totient is φ = 16205760.

The previous prime is 30430903. The next prime is 30430919. The reversal of 30430905 is 50903403.

It is not a de Polignac number, because 30430905 - 2¹ = 30430903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30430903) 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, 14322 + ... + 16308.

It is an arithmetic number, because the mean of its divisors is an integer number (3047604).

Almost surely, 2^30430905 is an apocalyptic number.

It is an amenable number.

30430905 is a deficient number, since it is larger than the sum of its proper divisors (18330759).

30430905 is a wasteful number, since it uses less digits than its factorization.

30430905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 30430905 is about 5516.4213943462. The cubic root of 30430905 is about 312.2038752143.

The spelling of 30430905 in words is "thirty million, four hundred thirty thousand, nine hundred five".