28449 has 12 divisors (see below), whose sum is σ = 42900. Its totient is φ = 18144.

The previous prime is 28447. The next prime is 28463. The reversal of 28449 is 94482.

28449 = T₂₉ + T₃₀ + ... + T₅₇.

28449 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17424 + 11025 = 132^2 + 105^2 .

It is not a de Polignac number, because 28449 - 2¹ = 28447 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

Its product of digits (2304) is a multiple of the sum of its prime factors (144).

It is a plaindrome in base 12.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207 + ... + 315.

It is an arithmetic number, because the mean of its divisors is an integer number (3575).

2²⁸⁴⁴⁹ is an apocalyptic number.

28449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28449 is a deficient number, since it is larger than the sum of its proper divisors (14451).

28449 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (28448) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (144).

28449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 141 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28449 is about 168.6683135624. The cubic root of 28449 is about 30.5273426757.

It can be divided in two parts, 284 and 49, that added together give a palindrome (333).

The spelling of 28449 in words is "twenty-eight thousand, four hundred forty-nine".