804424 has 16 divisors (see below), whose sum is σ = 1519020. Its totient is φ = 399360.

The previous prime is 804409. The next prime is 804443. The reversal of 804424 is 424408.

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 47524 = 870^2 + 218^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 804395 and 804404.

It is an unprimeable number.

804424 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 1284 + ... + 1804.

2⁸⁰⁴⁴²⁴ is an apocalyptic number.

It is an amenable number.

804424 is a deficient number, since it is larger than the sum of its proper divisors (714596).

804424 is a wasteful number, since it uses less digits than its factorization.

804424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 804424 is about 896.8968725556. The cubic root of 804424 is about 93.0025821151.

The spelling of 804424 in words is "eight hundred four thousand, four hundred twenty-four".