28403033 has 2 divisors, whose sum is σ = 28403034. Its totient is φ = 28403032.

The previous prime is 28403029. The next prime is 28403047. The reversal of 28403033 is 33030482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27175369 + 1227664 = 5213^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 28403033 - 2² = 28403029 is a prime.

It is not a weakly prime, because it can be changed into another prime (28403083) 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 as a sum of consecutive naturals, namely, 14201516 + 14201517.

It is an arithmetic number, because the mean of its divisors is an integer number (14201517).

Almost surely, 2^28403033 is an apocalyptic number.

It is an amenable number.

28403033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28403033 is an equidigital number, since it uses as much as digits as its factorization.

28403033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 28403033 is about 5329.4495963467. The cubic root of 28403033 is about 305.1089210547.

The spelling of 28403033 in words is "twenty-eight million, four hundred three thousand, thirty-three".