404523420 has 72 divisors (see below), whose sum is σ = 1317600144. Its totient is φ = 92461824.

The previous prime is 404523367. The next prime is 404523439. The reversal of 404523420 is 24325404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65857 + ... + 71736.

It is an arithmetic number, because the mean of its divisors is an integer number (18300002).

Almost surely, 2^404523420 is an apocalyptic number.

It is an amenable number.

404523420 is an abundant number, since it is smaller than the sum of its proper divisors (913076724).

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

404523420 is a wasteful number, since it uses less digits than its factorization.

404523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137619 (or 137610 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 404523420 is about 20112.7675867843. The cubic root of 404523420 is about 739.5732991687.

Adding to 404523420 its reverse (24325404), we get a palindrome (428848824).

The spelling of 404523420 in words is "four hundred four million, five hundred twenty-three thousand, four hundred twenty".