28448311 has 2 divisors, whose sum is σ = 28448312. Its totient is φ = 28448310.

The previous prime is 28448281. The next prime is 28448323. The reversal of 28448311 is 11384482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28448311 - 2⁵ = 28448279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28448341) 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, 14224155 + 14224156.

It is an arithmetic number, because the mean of its divisors is an integer number (14224156).

Almost surely, 2^28448311 is an apocalyptic number.

28448311 is a deficient number, since it is larger than the sum of its proper divisors (1).

28448311 is an equidigital number, since it uses as much as digits as its factorization.

28448311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 28448311 is about 5333.6958105989. The cubic root of 28448311 is about 305.2709622872.

The spelling of 28448311 in words is "twenty-eight million, four hundred forty-eight thousand, three hundred eleven".