78822 has 24 divisors (see below), whose sum is σ = 177840. Its totient is φ = 25200.

The previous prime is 78809. The next prime is 78823. The reversal of 78822 is 22887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78823) by changing a digit.

78822 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 in 11 ways as a sum of consecutive naturals, for example, 447 + ... + 597.

It is an arithmetic number, because the mean of its divisors is an integer number (7410).

2⁷⁸⁸²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88920).

78822 is an abundant number, since it is smaller than the sum of its proper divisors (99018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78822 is a wasteful number, since it uses less digits than its factorization.

78822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 185 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 78822 is about 280.7525600952. The cubic root of 78822 is about 42.8761534708.

It can be divided in two parts, 78 and 822, that added together give a square (900 = 30²).

The spelling of 78822 in words is "seventy-eight thousand, eight hundred twenty-two".