28929 has 4 divisors (see below), whose sum is σ = 38576. Its totient is φ = 19284.

The previous prime is 28927. The next prime is 28933. The reversal of 28929 is 92982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28929 - 2¹ = 28927 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 28896 and 28905.

It is not an unprimeable number, because it can be changed into a prime (28921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4819 + ... + 4824.

It is an arithmetic number, because the mean of its divisors is an integer number (9644).

It is a Proth number, since it is equal to 113 ⋅ 2⁸ + 1 and 113 < 2⁸.

2²⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

28929 is a deficient number, since it is larger than the sum of its proper divisors (9647).

28929 is an equidigital number, since it uses as much as digits as its factorization.

28929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646.

The product of its digits is 2592, while the sum is 30.

The square root of 28929 is about 170.0852727311. The cubic root of 28929 is about 30.6980748367.

The spelling of 28929 in words is "twenty-eight thousand, nine hundred twenty-nine".