404540522 has 8 divisors (see below), whose sum is σ = 621611172. Its totient is φ = 197336800.

The previous prime is 404540519. The next prime is 404540527. The reversal of 404540522 is 225045404.

It can be written as a sum of positive squares in 2 ways, for example, as 250557241 + 153983281 = 15829^2 + 12409^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 404540491 and 404540500.

It is not an unprimeable number, because it can be changed into a prime (404540527) 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, 2466629 + ... + 2466792.

Almost surely, 2^404540522 is an apocalyptic number.

404540522 is a deficient number, since it is larger than the sum of its proper divisors (217070650).

404540522 is a wasteful number, since it uses less digits than its factorization.

404540522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933464.

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

The square root of 404540522 is about 20113.1927351179. The cubic root of 404540522 is about 739.5837213129.

Adding to 404540522 its reverse (225045404), we get a palindrome (629585926).

The spelling of 404540522 in words is "four hundred four million, five hundred forty thousand, five hundred twenty-two".