404863 has 4 divisors (see below), whose sum is σ = 406728. Its totient is φ = 403000.

The previous prime is 404851. The next prime is 404941. The reversal of 404863 is 368404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404863 is a prime.

It is a Duffinian number.

404863 is a lucky 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556 + ... + 1057.

It is an arithmetic number, because the mean of its divisors is an integer number (101682).

2⁴⁰⁴⁸⁶³ is an apocalyptic number.

404863 is a deficient number, since it is larger than the sum of its proper divisors (1865).

404863 is a wasteful number, since it uses less digits than its factorization.

404863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 404863 is about 636.2884565981. The cubic root of 404863 is about 73.9780187939.

The spelling of 404863 in words is "four hundred four thousand, eight hundred sixty-three".