30507945 has 32 divisors (see below), whose sum is σ = 55665792. Its totient is φ = 14134272.

The previous prime is 30507931. The next prime is 30507973. The reversal of 30507945 is 54970503.

It is not a de Polignac number, because 30507945 - 2⁴ = 30507929 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1287 + ... + 7916.

It is an arithmetic number, because the mean of its divisors is an integer number (1739556).

Almost surely, 2^30507945 is an apocalyptic number.

It is an amenable number.

30507945 is a deficient number, since it is larger than the sum of its proper divisors (25157847).

30507945 is a wasteful number, since it uses less digits than its factorization.

30507945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9241.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 30507945 is about 5523.3997682587. The cubic root of 30507945 is about 312.4671154730.

The spelling of 30507945 in words is "thirty million, five hundred seven thousand, nine hundred forty-five".