820823312 has 20 divisors (see below), whose sum is σ = 1606743516. Its totient is φ = 406179840.

The previous prime is 820823309. The next prime is 820823329. The reversal of 820823312 is 213328028.

It can be written as a sum of positive squares in 2 ways, for example, as 343138576 + 477684736 = 18524^2 + 21856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262889 + ... + 265992.

Almost surely, 2^820823312 is an apocalyptic number.

It is an amenable number.

820823312 is a deficient number, since it is larger than the sum of its proper divisors (785920204).

820823312 is a wasteful number, since it uses less digits than its factorization.

820823312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528986 (or 528980 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 820823312 is about 28650.0141710262. The cubic root of 820823312 is about 936.3033144150.

The spelling of 820823312 in words is "eight hundred twenty million, eight hundred twenty-three thousand, three hundred twelve".