28049 has 4 divisors (see below), whose sum is σ = 32064. Its totient is φ = 24036.

The previous prime is 28031. The next prime is 28051. The reversal of 28049 is 94082.

28049 = T₈₆ + T₈₇ + ... + T₉₂.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94082 = 2 ⋅47041.

It is a cyclic number.

It is not a de Polignac number, because 28049 - 2⁸ = 27793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (28019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (8016).

2²⁸⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

28049 is a deficient number, since it is larger than the sum of its proper divisors (4015).

28049 is an equidigital number, since it uses as much as digits as its factorization.

28049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28049 is about 167.4783568107. The cubic root of 28049 is about 30.3835928316.

The spelling of 28049 in words is "twenty-eight thousand, forty-nine".