28229 has 2 divisors, whose sum is σ = 28230. Its totient is φ = 28228.

The previous prime is 28219. The next prime is 28277. The reversal of 28229 is 92282.

28229 = 96² + 97² + 98².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16129 + 12100 = 127^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 28229 - 2¹² = 24133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114 + 14115.

It is an arithmetic number, because the mean of its divisors is an integer number (14115).

2²⁸²²⁹ is an apocalyptic number.

It is an amenable number.

28229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28229 is an equidigital number, since it uses as much as digits as its factorization.

28229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 28229 is about 168.0148802934. The cubic root of 28229 is about 30.4484482552.

The spelling of 28229 in words is "twenty-eight thousand, two hundred twenty-nine".