404004481 has 8 divisors (see below), whose sum is σ = 418161600. Its totient is φ = 389862480.

The previous prime is 404004451. The next prime is 404004487. The reversal of 404004481 is 184400404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404004481 - 2²¹ = 401907329 is a prime.

It is a super-2 number, since 2×404004481² = 326439241336158722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404004487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92730 + ... + 96988.

It is an arithmetic number, because the mean of its divisors is an integer number (52270200).

Almost surely, 2^404004481 is an apocalyptic number.

It is an amenable number.

404004481 is a deficient number, since it is larger than the sum of its proper divisors (14157119).

404004481 is a wasteful number, since it uses less digits than its factorization.

404004481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7559.

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 404004481 is about 20099.8627109739. The cubic root of 404004481 is about 739.2569123279.

Adding to 404004481 its reverse (184400404), we get a palindrome (588404885).

The spelling of 404004481 in words is "four hundred four million, four thousand, four hundred eighty-one".