404400554 has 4 divisors (see below), whose sum is σ = 606600834. Its totient is φ = 202200276.

The previous prime is 404400553. The next prime is 404400571. The reversal of 404400554 is 455004404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 383102329 + 21298225 = 19573^2 + 4615^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (404400553) 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 as a sum of consecutive naturals, namely, 101100137 + ... + 101100140.

Almost surely, 2^404400554 is an apocalyptic number.

404400554 is a deficient number, since it is larger than the sum of its proper divisors (202200280).

404400554 is a wasteful number, since it uses less digits than its factorization.

404400554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202200279.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 404400554 is about 20109.7129268421. The cubic root of 404400554 is about 739.4984146586.

Adding to 404400554 its reverse (455004404), we get a palindrome (859404958).

The spelling of 404400554 in words is "four hundred four million, four hundred thousand, five hundred fifty-four".