5728 has 12 divisors (see below), whose sum is σ = 11340. Its totient is φ = 2848.

The previous prime is 5717. The next prime is 5737. The reversal of 5728 is 8275.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 5699 and 5708.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 58 + ... + 121.

It is an arithmetic number, because the mean of its divisors is an integer number (945).

2⁵⁷²⁸ is an apocalyptic number.

It is an amenable number.

5728 is a deficient number, since it is larger than the sum of its proper divisors (5612).

5728 is a wasteful number, since it uses less digits than its factorization.

5728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 181 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 5728 is about 75.6835517137. The cubic root of 5728 is about 17.8923617318.

It can be divided in two parts, 57 and 28, that multiplied together give a triangular number (1596 = T₅₆).

The spelling of 5728 in words is "five thousand, seven hundred twenty-eight".