404104240 has 20 divisors (see below), whose sum is σ = 939542544. Its totient is φ = 161641664.

The previous prime is 404104219. The next prime is 404104243. The reversal of 404104240 is 42401404.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (404104243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525572 + ... + 2525731.

Almost surely, 2^404104240 is an apocalyptic number.

404104240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404104240 is an abundant number, since it is smaller than the sum of its proper divisors (535438304).

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

404104240 is a wasteful number, since it uses less digits than its factorization.

404104240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051316 (or 5051310 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 404104240 is about 20102.3441419154. The cubic root of 404104240 is about 739.3177544428.

Adding to 404104240 its reverse (42401404), we get a palindrome (446505644).

The spelling of 404104240 in words is "four hundred four million, one hundred four thousand, two hundred forty".