809399604 has 24 divisors (see below), whose sum is σ = 2033876320. Its totient is φ = 249045984.

The previous prime is 809399603. The next prime is 809399609. The reversal of 809399604 is 406993908.

It is a happy number.

809399604 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 (809399603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2594074 + ... + 2594385.

Almost surely, 2^809399604 is an apocalyptic number.

It is an amenable number.

809399604 is an abundant number, since it is smaller than the sum of its proper divisors (1224476716).

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

809399604 is a wasteful number, since it uses less digits than its factorization.

809399604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188479 (or 5188477 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 809399604 is about 28449.9491036452. The cubic root of 809399604 is about 931.9393775768.

The spelling of 809399604 in words is "eight hundred nine million, three hundred ninety-nine thousand, six hundred four".