28730065 has 32 divisors (see below), whose sum is σ = 42771456. Its totient is φ = 18040320.

The previous prime is 28730057. The next prime is 28730077. The reversal of 28730065 is 56003782.

It is not a de Polignac number, because 28730065 - 2³ = 28730057 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 105880 + ... + 106150.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608).

Almost surely, 2^28730065 is an apocalyptic number.

It is an amenable number.

28730065 is a deficient number, since it is larger than the sum of its proper divisors (14041391).

28730065 is a wasteful number, since it uses less digits than its factorization.

28730065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 28730065 is about 5360.0433766902. The cubic root of 28730065 is about 306.2754614399.

The spelling of 28730065 in words is "twenty-eight million, seven hundred thirty thousand, sixty-five".