30380865 has 16 divisors (see below), whose sum is σ = 48983616. Its totient is φ = 16078400.

The previous prime is 30380863. The next prime is 30380869. The reversal of 30380865 is 56808303.

It is not a de Polignac number, because 30380865 - 2¹ = 30380863 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30380863) 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, 5766 + ... + 9695.

It is an arithmetic number, because the mean of its divisors is an integer number (3061476).

Almost surely, 2^30380865 is an apocalyptic number.

It is an amenable number.

30380865 is a deficient number, since it is larger than the sum of its proper divisors (18602751).

30380865 is a wasteful number, since it uses less digits than its factorization.

30380865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 30380865 is about 5511.8839791853. The cubic root of 30380865 is about 312.0326539623.

The spelling of 30380865 in words is "thirty million, three hundred eighty thousand, eight hundred sixty-five".