820881208 has 16 divisors (see below), whose sum is σ = 1759031280. Its totient is φ = 351806208.

The previous prime is 820881199. The next prime is 820881241. The reversal of 820881208 is 802188028.

It is a congruent number.

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, 7329241 + ... + 7329352.

It is an arithmetic number, because the mean of its divisors is an integer number (109939455).

Almost surely, 2^820881208 is an apocalyptic number.

It is an amenable number.

820881208 is an abundant number, since it is smaller than the sum of its proper divisors (938150072).

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

820881208 is a wasteful number, since it uses less digits than its factorization.

820881208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14658606 (or 14658602 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 820881208 is about 28651.0245541063. The cubic root of 820881208 is about 936.3253276552.

The spelling of 820881208 in words is "eight hundred twenty million, eight hundred eighty-one thousand, two hundred eight".