28822 has 4 divisors (see below), whose sum is σ = 43236. Its totient is φ = 14410.

The previous prime is 28817. The next prime is 28837. The reversal of 28822 is 22882.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28793 and 28802.

It is a congruent number.

It is an unprimeable number.

28822 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 7204 + ... + 7207.

It is an arithmetic number, because the mean of its divisors is an integer number (10809).

2²⁸⁸²² is an apocalyptic number.

28822 is a deficient number, since it is larger than the sum of its proper divisors (14414).

28822 is a wasteful number, since it uses less digits than its factorization.

28822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14413.

The product of its digits is 512, while the sum is 22.

The square root of 28822 is about 169.7704332326. The cubic root of 28822 is about 30.6601803127.

It can be divided in two parts, 288 and 22, that multiplied together give a palindrome (6336).

The spelling of 28822 in words is "twenty-eight thousand, eight hundred twenty-two".