820522944 has 42 divisors (see below), whose sum is σ = 2351882520. Its totient is φ = 273507456.

The previous prime is 820522943. The next prime is 820522949. The reversal of 820522944 is 449225028.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 820522899 and 820522908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820522943) 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 5 ways as a sum of consecutive naturals, for example, 711684 + ... + 712835.

Almost surely, 2^820522944 is an apocalyptic number.

It is an amenable number.

820522944 is an abundant number, since it is smaller than the sum of its proper divisors (1531359576).

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

820522944 is a wasteful number, since it uses less digits than its factorization.

820522944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424537 (or 1424524 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 820522944 is about 28644.7716695386. The cubic root of 820522944 is about 936.1890917553.

The spelling of 820522944 in words is "eight hundred twenty million, five hundred twenty-two thousand, nine hundred forty-four".