28286417 has 2 divisors, whose sum is σ = 28286418. Its totient is φ = 28286416.

The previous prime is 28286407. The next prime is 28286431. The reversal of 28286417 is 71468282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 450241 = 5276^2 + 671^2 .

It is a cyclic number.

It is not a de Polignac number, because 28286417 - 2¹⁸ = 28024273 is a prime.

It is not a weakly prime, because it can be changed into another prime (28286407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143208 + 14143209.

It is an arithmetic number, because the mean of its divisors is an integer number (14143209).

Almost surely, 2^28286417 is an apocalyptic number.

It is an amenable number.

28286417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28286417 is an equidigital number, since it uses as much as digits as its factorization.

28286417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 38.

The square root of 28286417 is about 5318.4976262099. The cubic root of 28286417 is about 304.6907804004.

The spelling of 28286417 in words is "twenty-eight million, two hundred eighty-six thousand, four hundred seventeen".