804189906 has 24 divisors (see below), whose sum is σ = 1876443660. Its totient is φ = 247442976.

The previous prime is 804189853. The next prime is 804189929. The reversal of 804189906 is 609981408.

It can be written as a sum of positive squares in 2 ways, for example, as 658384281 + 145805625 = 25659^2 + 12075^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1718121 + ... + 1718588.

Almost surely, 2^804189906 is an apocalyptic number.

804189906 is an abundant number, since it is smaller than the sum of its proper divisors (1072253754).

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

804189906 is a wasteful number, since it uses less digits than its factorization.

804189906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436730 (or 3436727 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 804189906 is about 28358.2422939081. The cubic root of 804189906 is about 929.9355973439.

The spelling of 804189906 in words is "eight hundred four million, one hundred eighty-nine thousand, nine hundred six".