404893 has 4 divisors (see below), whose sum is σ = 408928. Its totient is φ = 400860.

The previous prime is 404851. The next prime is 404941. The reversal of 404893 is 398404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404893 - 2⁹ = 404381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404843) 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 in 3 ways as a sum of consecutive naturals, for example, 1863 + ... + 2068.

It is an arithmetic number, because the mean of its divisors is an integer number (102232).

2⁴⁰⁴⁸⁹³ is an apocalyptic number.

It is an amenable number.

404893 is a deficient number, since it is larger than the sum of its proper divisors (4035).

404893 is a wasteful number, since it uses less digits than its factorization.

404893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 404893 is about 636.3120303750. The cubic root of 404893 is about 73.9798459846.

The spelling of 404893 in words is "four hundred four thousand, eight hundred ninety-three".