404024004 has 48 divisors (see below), whose sum is σ = 1073029440. Its totient is φ = 131388480.

The previous prime is 404023993. The next prime is 404024011. The reversal of 404024004 is 400420404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41194 + ... + 50049.

It is an arithmetic number, because the mean of its divisors is an integer number (22354780).

Almost surely, 2^404024004 is an apocalyptic number.

It is an amenable number.

404024004 is an abundant number, since it is smaller than the sum of its proper divisors (669005436).

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

404024004 is a wasteful number, since it uses less digits than its factorization.

404024004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91297 (or 91289 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404024004 is about 20100.3483551903. The cubic root of 404024004 is about 739.2688200178.

Adding to 404024004 its reverse (400420404), we get a palindrome (804444408).

The spelling of 404024004 in words is "four hundred four million, twenty-four thousand, four".