28315055 has 4 divisors (see below), whose sum is σ = 33978072. Its totient is φ = 22652040.

The previous prime is 28315043. The next prime is 28315069. The reversal of 28315055 is 55051382.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28315055 - 2⁸ = 28314799 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2831501 + ... + 2831510.

It is an arithmetic number, because the mean of its divisors is an integer number (8494518).

Almost surely, 2^28315055 is an apocalyptic number.

28315055 is a deficient number, since it is larger than the sum of its proper divisors (5663017).

28315055 is an equidigital number, since it uses as much as digits as its factorization.

28315055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663016.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 28315055 is about 5321.1892467756. The cubic root of 28315055 is about 304.7935716858.

The spelling of 28315055 in words is "twenty-eight million, three hundred fifteen thousand, fifty-five".