400204400204 has 48 divisors (see below), whose sum is σ = 808471841856. Its totient is φ = 169788960000.

The previous prime is 400204400087. The next prime is 400204400227. The reversal of 400204400204 is 402004402004.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27992882 + ... + 28007174.

It is an arithmetic number, because the mean of its divisors is an integer number (16843163372).

Almost surely, 2^400204400204 is an apocalyptic number.

It is an amenable number.

400204400204 is an abundant number, since it is smaller than the sum of its proper divisors (408267441652).

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

400204400204 is a wasteful number, since it uses less digits than its factorization.

400204400204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24306 (or 24304 counting only the distinct ones).

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

Adding to 400204400204 its reverse (402004402004), we get a palindrome (802208802208).

The spelling of 400204400204 in words is "four hundred billion, two hundred four million, four hundred thousand, two hundred four".