404438 has 4 divisors (see below), whose sum is σ = 606660. Its totient is φ = 202218.

The previous prime is 404431. The next prime is 404449. The reversal of 404438 is 834404.

It is a semiprime because it is the product of two primes.

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 404438.

It is not an unprimeable number, because it can be changed into a prime (404431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101108 + ... + 101111.

It is an arithmetic number, because the mean of its divisors is an integer number (151665).

2⁴⁰⁴⁴³⁸ is an apocalyptic number.

404438 is a deficient number, since it is larger than the sum of its proper divisors (202222).

404438 is a wasteful number, since it uses less digits than its factorization.

404438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202221.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 404438 is about 635.9544008811. The cubic root of 404438 is about 73.9521238896.

The spelling of 404438 in words is "four hundred four thousand, four hundred thirty-eight".