978822 has 48 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 291456.

The previous prime is 978821. The next prime is 978839. The reversal of 978822 is 228879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10954 + ... + 11042.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁹⁷⁸⁸²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179360).

978822 is an abundant number, since it is smaller than the sum of its proper divisors (1379898).

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

978822 is a wasteful number, since it uses less digits than its factorization.

978822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 154 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 978822 is about 989.3543349074. The cubic root of 978822 is about 99.2890237744.

The spelling of 978822 in words is "nine hundred seventy-eight thousand, eight hundred twenty-two".