30128065 has 16 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 21808000.

The previous prime is 30128051. The next prime is 30128089. The reversal of 30128065 is 56082103.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-30128065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11640 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^30128065 is an apocalyptic number.

It is an amenable number.

30128065 is a deficient number, since it is larger than the sum of its proper divisors (9498431).

30128065 is a wasteful number, since it uses less digits than its factorization.

30128065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 30128065 is about 5488.9038067724. The cubic root of 30128065 is about 311.1647648630.

The spelling of 30128065 in words is "thirty million, one hundred twenty-eight thousand, sixty-five".