820725208 has 16 divisors (see below), whose sum is σ = 1576393560. Its totient is φ = 400353600.

The previous prime is 820725173. The next prime is 820725209. The reversal of 820725208 is 802527028.

820725208 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 not an unprimeable number, because it can be changed into a prime (820725209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250778 + ... + 1251433.

Almost surely, 2^820725208 is an apocalyptic number.

It is an amenable number.

820725208 is a deficient number, since it is larger than the sum of its proper divisors (755668352).

820725208 is a wasteful number, since it uses less digits than its factorization.

820725208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502258 (or 2502254 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 820725208 is about 28648.3020090197. The cubic root of 820725208 is about 936.2660109098.

The spelling of 820725208 in words is "eight hundred twenty million, seven hundred twenty-five thousand, two hundred eight".