404404401 has 4 divisors (see below), whose sum is σ = 539205872. Its totient is φ = 269602932.

The previous prime is 404404387. The next prime is 404404411. The reversal of 404404401 is 104404404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 404404401 - 2⁵ = 404404369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404404411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67400731 + ... + 67400736.

It is an arithmetic number, because the mean of its divisors is an integer number (134801468).

Almost surely, 2^404404401 is an apocalyptic number.

It is an amenable number.

404404401 is a deficient number, since it is larger than the sum of its proper divisors (134801471).

404404401 is a wasteful number, since it uses less digits than its factorization.

404404401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134801470.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 404404401 is about 20109.8085769109. The cubic root of 404404401 is about 739.5007595626.

Adding to 404404401 its reverse (104404404), we get a palindrome (508808805).

The spelling of 404404401 in words is "four hundred four million, four hundred four thousand, four hundred one".