8685322820 has 24 divisors (see below), whose sum is σ = 18301440024. Its totient is φ = 3462269696.

The previous prime is 8685322817. The next prime is 8685322837. The reversal of 8685322820 is 282235868.

It can be written as a sum of positive squares in 4 ways, for example, as 5677019716 + 3008303104 = 75346^2 + 54848^2 .

It is a super-2 number, since 2×8685322820² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 735209 + ... + 746928.

It is an arithmetic number, because the mean of its divisors is an integer number (762560001).

Almost surely, 2^8685322820 is an apocalyptic number.

It is an amenable number.

8685322820 is an abundant number, since it is smaller than the sum of its proper divisors (9616117204).

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

8685322820 is a wasteful number, since it uses less digits than its factorization.

8685322820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482439 (or 1482437 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The square root of 8685322820 is about 93195.0793765422. The cubic root of 8685322820 is about 2055.5528864809.

The spelling of 8685322820 in words is "eight billion, six hundred eighty-five million, three hundred twenty-two thousand, eight hundred twenty".