822978 has 24 divisors (see below), whose sum is σ = 1920828. Its totient is φ = 253152.

The previous prime is 822973. The next prime is 822989. The reversal of 822978 is 879228.

It can be written as a sum of positive squares in 2 ways, for example, as 815409 + 7569 = 903^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (822971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1525 + ... + 1992.

2⁸²²⁹⁷⁸ is an apocalyptic number.

822978 is an abundant number, since it is smaller than the sum of its proper divisors (1097850).

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

822978 is a wasteful number, since it uses less digits than its factorization.

822978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538 (or 3535 counting only the distinct ones).

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

The square root of 822978 is about 907.1813490146. The cubic root of 822978 is about 93.7121874176.

The spelling of 822978 in words is "eight hundred twenty-two thousand, nine hundred seventy-eight".