28803133 has 2 divisors, whose sum is σ = 28803134. Its totient is φ = 28803132.

The previous prime is 28803109. The next prime is 28803149. The reversal of 28803133 is 33130882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16426809 + 12376324 = 4053^2 + 3518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28803133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28803193) 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, 14401566 + 14401567.

It is an arithmetic number, because the mean of its divisors is an integer number (14401567).

Almost surely, 2^28803133 is an apocalyptic number.

It is an amenable number.

28803133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28803133 is an equidigital number, since it uses as much as digits as its factorization.

28803133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28803133 is about 5366.8550381019. The cubic root of 28803133 is about 306.5348875889.

The spelling of 28803133 in words is "twenty-eight million, eight hundred three thousand, one hundred thirty-three".