28773 has 12 divisors (see below), whose sum is σ = 43680. Its totient is φ = 18216.

The previous prime is 28771. The next prime is 28789. The reversal of 28773 is 37782.

It is not a de Polignac number, because 28773 - 2¹ = 28771 is a prime.

It is an Ulam number.

Its product of digits (2352) is a multiple of the sum of its prime factors (168).

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28773.

It is not an unprimeable number, because it can be changed into a prime (28771) 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 in 11 ways as a sum of consecutive naturals, for example, 138 + ... + 276.

It is an arithmetic number, because the mean of its divisors is an integer number (3640).

2²⁸⁷⁷³ is an apocalyptic number.

28773 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28773 is a deficient number, since it is larger than the sum of its proper divisors (14907).

28773 is a wasteful number, since it uses less digits than its factorization.

28773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 165 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 28773 is about 169.6260593187. The cubic root of 28773 is about 30.6427954329.

Adding to 28773 its product of digits (2352), we get a triangular number (31125 = T₂₄₉).

Subtracting 28773 from its reverse (37782), we obtain a palindrome (9009).

The spelling of 28773 in words is "twenty-eight thousand, seven hundred seventy-three".