30128085 has 32 divisors (see below), whose sum is σ = 57684480. Its totient is φ = 14831424.

The previous prime is 30128051. The next prime is 30128089. The reversal of 30128085 is 58082103.

It is a happy number.

30128085 is a `hidden beast` number, since 301 + 280 + 85 = 666.

It is not a de Polignac number, because 30128085 - 2¹⁰ = 30127061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128089) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6829 + ... + 10338.

It is an arithmetic number, because the mean of its divisors is an integer number (1802640).

Almost surely, 2^30128085 is an apocalyptic number.

It is an amenable number.

30128085 is a deficient number, since it is larger than the sum of its proper divisors (27556395).

30128085 is a wasteful number, since it uses less digits than its factorization.

30128085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17194 (or 17188 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 30128085 is about 5488.9056286294. The cubic root of 30128085 is about 311.1648337168.

The spelling of 30128085 in words is "thirty million, one hundred twenty-eight thousand, eighty-five".