28784033 has 2 divisors, whose sum is σ = 28784034. Its totient is φ = 28784032.

The previous prime is 28784023. The next prime is 28784047. The reversal of 28784033 is 33048782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26915344 + 1868689 = 5188^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 28784033 - 2¹⁴ = 28767649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28783984 and 28784002.

It is not a weakly prime, because it can be changed into another prime (28784023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392016 + 14392017.

It is an arithmetic number, because the mean of its divisors is an integer number (14392017).

Almost surely, 2^28784033 is an apocalyptic number.

It is an amenable number.

28784033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28784033 is an equidigital number, since it uses as much as digits as its factorization.

28784033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28784033 is about 5365.0753023606. The cubic root of 28784033 is about 306.4671158991.

The spelling of 28784033 in words is "twenty-eight million, seven hundred eighty-four thousand, thirty-three".