404044040 has 16 divisors (see below), whose sum is σ = 909099180. Its totient is φ = 161617600.

The previous prime is 404044027. The next prime is 404044051. The reversal of 404044040 is 40440404.

It can be written as a sum of positive squares in 2 ways, for example, as 390220516 + 13823524 = 19754^2 + 3718^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050511 + ... + 5050590.

Almost surely, 2^404044040 is an apocalyptic number.

404044040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404044040 is an abundant number, since it is smaller than the sum of its proper divisors (505055140).

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

404044040 is a wasteful number, since it uses less digits than its factorization.

404044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101112 (or 10101108 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 404044040 is about 20100.8467483338. The cubic root of 404044040 is about 739.2810402036.

Adding to 404044040 its reverse (40440404), we get a palindrome (444484444).

It can be divided in two parts, 40404 and 4040, that added together give a palindrome (44444).

The spelling of 404044040 in words is "four hundred four million, forty-four thousand, forty".