409804 has 6 divisors (see below), whose sum is σ = 717164. Its totient is φ = 204900.

The previous prime is 409781. The next prime is 409813. The reversal of 409804 is 408904.

It is a super-3 number, since 3×409804³ = 206466613332451392, which contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51222 + ... + 51229.

2⁴⁰⁹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

409804 is a deficient number, since it is larger than the sum of its proper divisors (307360).

409804 is a wasteful number, since it uses less digits than its factorization.

409804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102455 (or 102453 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 409804 is about 640.1593551609. The cubic root of 409804 is about 74.2777485119.

Subtracting from 409804 its reverse (408904), we obtain a square (900 = 30²).

The spelling of 409804 in words is "four hundred nine thousand, eight hundred four".