820859604 has 24 divisors (see below), whose sum is σ = 1998615360. Its totient is φ = 261723264.

The previous prime is 820859563. The next prime is 820859617. The reversal of 820859604 is 406958028.

820859604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486789 + ... + 1487340.

It is an arithmetic number, because the mean of its divisors is an integer number (83275640).

Almost surely, 2^820859604 is an apocalyptic number.

It is an amenable number.

820859604 is an abundant number, since it is smaller than the sum of its proper divisors (1177755756).

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

820859604 is a wasteful number, since it uses less digits than its factorization.

820859604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974159 (or 2974157 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 820859604 is about 28650.6475319494. The cubic root of 820859604 is about 936.3171134948.

The spelling of 820859604 in words is "eight hundred twenty million, eight hundred fifty-nine thousand, six hundred four".