28032033 has 4 divisors (see below), whose sum is σ = 37376048. Its totient is φ = 18688020.

The previous prime is 28032019. The next prime is 28032041. The reversal of 28032033 is 33023082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-28032033 is a prime.

It is a super-4 number, since 4×28032033⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28032833) 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, 4672003 + ... + 4672008.

It is an arithmetic number, because the mean of its divisors is an integer number (9344012).

Almost surely, 2^28032033 is an apocalyptic number.

It is an amenable number.

28032033 is a deficient number, since it is larger than the sum of its proper divisors (9344015).

28032033 is an equidigital number, since it uses as much as digits as its factorization.

28032033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9344014.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 28032033 is about 5294.5285909135. The cubic root of 28032033 is about 303.7746519307.

The spelling of 28032033 in words is "twenty-eight million, thirty-two thousand, thirty-three".