30128075 has 6 divisors (see below), whose sum is σ = 37358844. Its totient is φ = 24102440.

The previous prime is 30128051. The next prime is 30128089. The reversal of 30128075 is 57082103.

It is not a de Polignac number, because 30128075 - 2⁶ = 30128011 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 602537 + ... + 602586.

It is an arithmetic number, because the mean of its divisors is an integer number (6226474).

Almost surely, 2^30128075 is an apocalyptic number.

30128075 is a deficient number, since it is larger than the sum of its proper divisors (7230769).

30128075 is a wasteful number, since it uses less digits than its factorization.

30128075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205133 (or 1205128 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 30128075 is about 5488.9047177010. The cubic root of 30128075 is about 311.1647992899.

The spelling of 30128075 in words is "thirty million, one hundred twenty-eight thousand, seventy-five".