805404 has 24 divisors (see below), whose sum is σ = 1926288. Its totient is φ = 261760.

The previous prime is 805403. The next prime is 805421. The reversal of 805404 is 404508.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805404.

It is not an unprimeable number, because it can be changed into a prime (805403) 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, 327 + ... + 1310.

It is an arithmetic number, because the mean of its divisors is an integer number (80262).

2⁸⁰⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

805404 is an abundant number, since it is smaller than the sum of its proper divisors (1120884).

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

805404 is a wasteful number, since it uses less digits than its factorization.

805404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 805404 is about 897.4430344039. The cubic root of 805404 is about 93.0403339904.

The spelling of 805404 in words is "eight hundred five thousand, four hundred four".