28534859 has 4 divisors (see below), whose sum is σ = 28679904. Its totient is φ = 28389816.

The previous prime is 28534853. The next prime is 28534861. The reversal of 28534859 is 95843582.

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

It is a cyclic number.

It is not a de Polignac number, because 28534859 - 2¹² = 28530763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28534853) by changing a digit.

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, 72227 + ... + 72620.

It is an arithmetic number, because the mean of its divisors is an integer number (7169976).

Almost surely, 2^28534859 is an apocalyptic number.

28534859 is a deficient number, since it is larger than the sum of its proper divisors (145045).

28534859 is a wasteful number, since it uses less digits than its factorization.

28534859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145044.

The product of its digits is 345600, while the sum is 44.

The square root of 28534859 is about 5341.8029727799. The cubic root of 28534859 is about 305.5802231007.

The spelling of 28534859 in words is "twenty-eight million, five hundred thirty-four thousand, eight hundred fifty-nine".