7822 has 4 divisors (see below), whose sum is σ = 11736. Its totient is φ = 3910.

The previous prime is 7817. The next prime is 7823. The reversal of 7822 is 2287.

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

It is a super-2 number, since 2×7822² = 122367368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7823) by changing a digit.

7822 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1954 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (2934).

2⁷⁸²² is an apocalyptic number.

7822 is a deficient number, since it is larger than the sum of its proper divisors (3914).

7822 is a wasteful number, since it uses less digits than its factorization.

7822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913.

The product of its digits is 224, while the sum is 19.

The square root of 7822 is about 88.4420714366. The cubic root of 7822 is about 19.8505527238.

It can be divided in two parts, 782 and 2, that added together give a square (784 = 28²).

The spelling of 7822 in words is "seven thousand, eight hundred twenty-two".