808940205 has 12 divisors (see below), whose sum is σ = 1402163100. Its totient is φ = 431434752.

The previous prime is 808940183. The next prime is 808940207. The reversal of 808940205 is 502049808.

It can be written as a sum of positive squares in 2 ways, for example, as 191020041 + 617920164 = 13821^2 + 24858^2 .

It is not a de Polignac number, because 808940205 - 2¹¹ = 808938157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 808940205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808940207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8988180 + ... + 8988269.

It is an arithmetic number, because the mean of its divisors is an integer number (116846925).

Almost surely, 2^808940205 is an apocalyptic number.

It is an amenable number.

808940205 is a deficient number, since it is larger than the sum of its proper divisors (593222895).

808940205 is a wasteful number, since it uses less digits than its factorization.

808940205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17976460 (or 17976457 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 808940205 is about 28441.8741471092. The cubic root of 808940205 is about 931.7630275014.

The spelling of 808940205 in words is "eight hundred eight million, nine hundred forty thousand, two hundred five".