28303057 has 2 divisors, whose sum is σ = 28303058. Its totient is φ = 28303056.

The previous prime is 28303021. The next prime is 28303081. The reversal of 28303057 is 75030382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 1718721 = 5156^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 28303057 - 2²³ = 19914449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28303357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14151528 + 14151529.

It is an arithmetic number, because the mean of its divisors is an integer number (14151529).

Almost surely, 2^28303057 is an apocalyptic number.

It is an amenable number.

28303057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28303057 is an equidigital number, since it uses as much as digits as its factorization.

28303057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 28303057 is about 5320.0617477620. The cubic root of 28303057 is about 304.7505153222.

The spelling of 28303057 in words is "twenty-eight million, three hundred three thousand, fifty-seven".