28448417 has 2 divisors, whose sum is σ = 28448418. Its totient is φ = 28448416.

The previous prime is 28448369. The next prime is 28448419. The reversal of 28448417 is 71484482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28398241 + 50176 = 5329^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 28448417 - 2²⁴ = 11671201 is a prime.

Together with 28448419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28448419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14224208 + 14224209.

It is an arithmetic number, because the mean of its divisors is an integer number (14224209).

Almost surely, 2^28448417 is an apocalyptic number.

It is an amenable number.

28448417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28448417 is an equidigital number, since it uses as much as digits as its factorization.

28448417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57344, while the sum is 38.

The square root of 28448417 is about 5333.7057474143. The cubic root of 28448417 is about 305.2713414389.

The spelling of 28448417 in words is "twenty-eight million, four hundred forty-eight thousand, four hundred seventeen".