28949 has 2 divisors, whose sum is σ = 28950. Its totient is φ = 28948.

The previous prime is 28933. The next prime is 28961. The reversal of 28949 is 94982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28900 + 49 = 170^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 28949 - 2⁴ = 28933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14474 + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (14475).

2²⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

28949 is a deficient number, since it is larger than the sum of its proper divisors (1).

28949 is an equidigital number, since it uses as much as digits as its factorization.

28949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 28949 is about 170.1440566109. The cubic root of 28949 is about 30.7051475558.

It can be divided in two parts, 289 and 49, that multiplied together give a square (14161 = 119²).

The spelling of 28949 in words is "twenty-eight thousand, nine hundred forty-nine".