820685322 has 12 divisors (see below), whose sum is σ = 1778151570. Its totient is φ = 273561768.

The previous prime is 820685321. The next prime is 820685381. The reversal of 820685322 is 223586028.

It can be written as a sum of positive squares in only one way, i.e., 767234601 + 53450721 = 27699^2 + 7311^2 .

It is not an unprimeable number, because it can be changed into a prime (820685321) 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, 22796797 + ... + 22796832.

Almost surely, 2^820685322 is an apocalyptic number.

820685322 is an abundant number, since it is smaller than the sum of its proper divisors (957466248).

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

820685322 is a wasteful number, since it uses less digits than its factorization.

820685322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45593637 (or 45593634 counting only the distinct ones).

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

The square root of 820685322 is about 28647.6058685538. The cubic root of 820685322 is about 936.2508436282.

It can be divided in two parts, 8206 and 85322, that added together give a triangular number (93528 = T₄₃₂).

The spelling of 820685322 in words is "eight hundred twenty million, six hundred eighty-five thousand, three hundred twenty-two".