28441 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 22848.

The previous prime is 28439. The next prime is 28447. The reversal of 28441 is 14482.

28441 is a nontrivial binomial coefficient, being equal to C(239, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28441 - 2¹ = 28439 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 238.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2²⁸⁴⁴¹ is an apocalyptic number.

28441 is the 238-th triangular number.

28441 is the 80-th centered nonagonal number.

It is an amenable number.

28441 is a deficient number, since it is larger than the sum of its proper divisors (6119).

28441 is a wasteful number, since it uses less digits than its factorization.

28441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263.

The product of its digits is 256, while the sum is 19.

The square root of 28441 is about 168.6445967115. The cubic root of 28441 is about 30.5244809273.

It can be divided in two parts, 284 and 41, that added together give a triangular number (325 = T₂₅).

The spelling of 28441 in words is "twenty-eight thousand, four hundred forty-one".