400020402204 has 60 divisors (see below), whose sum is σ = 1045794247344. Its totient is φ = 133332241536.

The previous prime is 400020402161. The next prime is 400020402209. The reversal of 400020402204 is 402204020004.

400020402204 is a `hidden beast` number, since 40 + 0 + 0 + 20 + 402 + 204 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400020402209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8566929 + ... + 8613495.

Almost surely, 2^400020402204 is an apocalyptic number.

It is an amenable number.

400020402204 is an abundant number, since it is smaller than the sum of its proper divisors (645773845140).

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

400020402204 is a wasteful number, since it uses less digits than its factorization.

400020402204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73096 (or 73085 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 400020402204 its reverse (402204020004), we get a palindrome (802224422208).

The spelling of 400020402204 in words is "four hundred billion, twenty million, four hundred two thousand, two hundred four".