404404040 has 32 divisors (see below), whose sum is σ = 910647360. Its totient is φ = 161630400.

The previous prime is 404404031. The next prime is 404404051. The reversal of 404404040 is 40404404.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 57095 + ... + 63785.

It is an arithmetic number, because the mean of its divisors is an integer number (28457730).

Almost surely, 2^404404040 is an apocalyptic number.

404404040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404404040 is an abundant number, since it is smaller than the sum of its proper divisors (506243320).

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

404404040 is a wasteful number, since it uses less digits than its factorization.

404404040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213 (or 8209 counting only the distinct ones).

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

The square root of 404404040 is about 20109.7996011895. The cubic root of 404404040 is about 739.5005395189.

Adding to 404404040 its reverse (40404404), we get a palindrome (444808444).

The spelling of 404404040 in words is "four hundred four million, four hundred four thousand, forty".