28484917 has 2 divisors, whose sum is σ = 28484918. Its totient is φ = 28484916.

The previous prime is 28484909. The next prime is 28484921. The reversal of 28484917 is 71948482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17255716 + 11229201 = 4154^2 + 3351^2 .

It is a cyclic number.

It is not a de Polignac number, because 28484917 - 2³ = 28484909 is a prime.

It is a super-2 number, since 2×28484917² = 1622780992993778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28484977) 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, 14242458 + 14242459.

It is an arithmetic number, because the mean of its divisors is an integer number (14242459).

Almost surely, 2^28484917 is an apocalyptic number.

It is an amenable number.

28484917 is a deficient number, since it is larger than the sum of its proper divisors (1).

28484917 is an equidigital number, since it uses as much as digits as its factorization.

28484917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 28484917 is about 5337.1262866828. The cubic root of 28484917 is about 305.4018424557.

The spelling of 28484917 in words is "twenty-eight million, four hundred eighty-four thousand, nine hundred seventeen".