28819 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 23496.

The previous prime is 28817. The next prime is 28837. The reversal of 28819 is 91882.

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

It is a cyclic number.

It is not a de Polignac number, because 28819 - 2¹ = 28817 is a prime.

It is a super-2 number, since 2×28819² = 1661069522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72 + ... + 250.

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

2²⁸⁸¹⁹ is an apocalyptic number.

28819 is a deficient number, since it is larger than the sum of its proper divisors (5741).

28819 is a wasteful number, since it uses less digits than its factorization.

28819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its digits is 1152, while the sum is 28.

The square root of 28819 is about 169.7615975420. The cubic root of 28819 is about 30.6591164988.

The spelling of 28819 in words is "twenty-eight thousand, eight hundred nineteen".