820823056 has 10 divisors (see below), whose sum is σ = 1590344702. Its totient is φ = 410411520.

The previous prime is 820823051. The next prime is 820823063. The reversal of 820823056 is 650328028.

It can be written as a sum of positive squares in only one way, i.e., 416813056 + 404010000 = 20416^2 + 20100^2 .

It is a super-2 number, since 2×820823056² = 1347500978522358272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820823051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25650705 + ... + 25650736.

Almost surely, 2^820823056 is an apocalyptic number.

It is an amenable number.

820823056 is a deficient number, since it is larger than the sum of its proper divisors (769521646).

820823056 is a wasteful number, since it uses less digits than its factorization.

820823056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51301449 (or 51301443 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 820823056 is about 28650.0097033142. The cubic root of 820823056 is about 936.3032170763.

The spelling of 820823056 in words is "eight hundred twenty million, eight hundred twenty-three thousand, fifty-six".