400204424 has 16 divisors (see below), whose sum is σ = 750609420. Its totient is φ = 200041920.

The previous prime is 400204423. The next prime is 400204457. The reversal of 400204424 is 424402004.

It can be written as a sum of positive squares in 2 ways, for example, as 371795524 + 28408900 = 19282^2 + 5330^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400204396 and 400204405.

It is not an unprimeable number, because it can be changed into a prime (400204421) 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, 34394 + ... + 44534.

Almost surely, 2^400204424 is an apocalyptic number.

It is an amenable number.

400204424 is a deficient number, since it is larger than the sum of its proper divisors (350404996).

400204424 is a wasteful number, since it uses less digits than its factorization.

400204424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080 (or 15076 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400204424 is about 20005.1099472110. The cubic root of 400204424 is about 736.9317957610.

Adding to 400204424 its reverse (424402004), we get a palindrome (824606428).

It can be divided in two parts, 40020 and 4424, that added together give a palindrome (44444).

The spelling of 400204424 in words is "four hundred million, two hundred four thousand, four hundred twenty-four".