28730255 has 16 divisors (see below), whose sum is σ = 36689760. Its totient is φ = 21522432.

The previous prime is 28730237. The next prime is 28730263. The reversal of 28730255 is 55203782.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28730255 is a prime.

It is a congruent 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, 18551 + ... + 20039.

It is an arithmetic number, because the mean of its divisors is an integer number (2293110).

Almost surely, 2^28730255 is an apocalyptic number.

28730255 is a deficient number, since it is larger than the sum of its proper divisors (7959505).

28730255 is a wasteful number, since it uses less digits than its factorization.

28730255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28730255 is about 5360.0611003980. The cubic root of 28730255 is about 306.2761366004.

The spelling of 28730255 in words is "twenty-eight million, seven hundred thirty thousand, two hundred fifty-five".