28648 has 8 divisors (see below), whose sum is σ = 53730. Its totient is φ = 14320.

The previous prime is 28643. The next prime is 28649. The reversal of 28648 is 84682.

It can be written as a sum of positive squares in only one way, i.e., 19044 + 9604 = 138^2 + 98^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783 + ... + 1798.

2²⁸⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

28648 is a deficient number, since it is larger than the sum of its proper divisors (25082).

28648 is a wasteful number, since it uses less digits than its factorization.

28648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3587 (or 3583 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 28648 is about 169.2572007331. The cubic root of 28648 is about 30.5983566691.

It can be divided in two parts, 28 and 648, that added together give a palindrome (676).

The spelling of 28648 in words is "twenty-eight thousand, six hundred forty-eight".