404401144 has 16 divisors (see below), whose sum is σ = 866574000. Its totient is φ = 173314752.

The previous prime is 404401141. The next prime is 404401159. The reversal of 404401144 is 441104404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404401141) 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, 3610669 + ... + 3610780.

It is an arithmetic number, because the mean of its divisors is an integer number (54160875).

Almost surely, 2^404401144 is an apocalyptic number.

It is an amenable number.

404401144 is an abundant number, since it is smaller than the sum of its proper divisors (462172856).

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

404401144 is a wasteful number, since it uses less digits than its factorization.

404401144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7221462 (or 7221458 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 404401144 is about 20109.7275963649. The cubic root of 404401144 is about 739.4987742887.

Adding to 404401144 its reverse (441104404), we get a palindrome (845505548).

The spelling of 404401144 in words is "four hundred four million, four hundred one thousand, one hundred forty-four".