404856 has 24 divisors (see below), whose sum is σ = 1096680. Its totient is φ = 134928.

The previous prime is 404851. The next prime is 404941. The reversal of 404856 is 658404.

It is a tau number, because it is divible by the number of its divisors (24).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404851) by changing a digit.

404856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2740 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (45695).

2⁴⁰⁴⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

404856 is an abundant number, since it is smaller than the sum of its proper divisors (691824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404856 is a wasteful number, since it uses less digits than its factorization.

404856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635 (or 5628 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 404856 is about 636.2829559245. The cubic root of 404856 is about 73.9775924364.

The spelling of 404856 in words is "four hundred four thousand, eight hundred fifty-six".