400404202024 has 16 divisors (see below), whose sum is σ = 750821502420. Its totient is φ = 200185134720.

The previous prime is 400404202019. The next prime is 400404202039. The reversal of 400404202024 is 420202404004.

It can be written as a sum of positive squares in 2 ways, for example, as 399487202500 + 916999524 = 632050^2 + 30282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400404201986 and 400404202004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020207 + ... + 2209534.

Almost surely, 2^400404202024 is an apocalyptic number.

It is an amenable number.

400404202024 is a deficient number, since it is larger than the sum of its proper divisors (350417300396).

400404202024 is a wasteful number, since it uses less digits than its factorization.

400404202024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241580 (or 4241576 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400404202024 its reverse (420202404004), we get a palindrome (820606606028).

The spelling of 400404202024 in words is "four hundred billion, four hundred four million, two hundred two thousand, twenty-four".