28005033 has 16 divisors (see below), whose sum is σ = 42848640. Its totient is φ = 15937536.

The previous prime is 28005023. The next prime is 28005073. The reversal of 28005033 is 33050082.

It is not a de Polignac number, because 28005033 - 2⁹ = 28004521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28005023) 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 15 ways as a sum of consecutive naturals, for example, 2803 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (2678040).

Almost surely, 2^28005033 is an apocalyptic number.

It is an amenable number.

28005033 is a deficient number, since it is larger than the sum of its proper divisors (14843607).

28005033 is a wasteful number, since it uses less digits than its factorization.

28005033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 28005033 is about 5291.9781745582. The cubic root of 28005033 is about 303.6770903265.

The spelling of 28005033 in words is "twenty-eight million, five thousand, thirty-three".