820585412 has 12 divisors (see below), whose sum is σ = 1436606976. Its totient is φ = 410126280.

The previous prime is 820585399. The next prime is 820585417. The reversal of 820585412 is 214585028.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (820585417) 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 3 ways as a sum of consecutive naturals, for example, 30164 + ... + 50507.

It is an arithmetic number, because the mean of its divisors is an integer number (119717248).

Almost surely, 2^820585412 is an apocalyptic number.

It is an amenable number.

820585412 is a deficient number, since it is larger than the sum of its proper divisors (616021564).

820585412 is a wasteful number, since it uses less digits than its factorization.

820585412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83218 (or 83216 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 820585412 is about 28645.8620397432. The cubic root of 820585412 is about 936.2128491149.

The spelling of 820585412 in words is "eight hundred twenty million, five hundred eighty-five thousand, four hundred twelve".