28533005 has 8 divisors (see below), whose sum is σ = 34579224. Its totient is φ = 22600000.

The previous prime is 28532971. The next prime is 28533017. The reversal of 28533005 is 50033582.

It can be written as a sum of positive squares in 4 ways, for example, as 4932841 + 23600164 = 2221^2 + 4858^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28533005 - 2¹⁰ = 28531981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27746 + ... + 28755.

It is an arithmetic number, because the mean of its divisors is an integer number (4322403).

Almost surely, 2^28533005 is an apocalyptic number.

It is an amenable number.

28533005 is a deficient number, since it is larger than the sum of its proper divisors (6046219).

28533005 is a wasteful number, since it uses less digits than its factorization.

28533005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56607.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 28533005 is about 5341.6294330476. The cubic root of 28533005 is about 305.5736047863.

Adding to 28533005 its reverse (50033582), we get a palindrome (78566587).

The spelling of 28533005 in words is "twenty-eight million, five hundred thirty-three thousand, five".