400244404020 has 48 divisors (see below), whose sum is σ = 1124819743488. Its totient is φ = 106337992320.

The previous prime is 400244404013. The next prime is 400244404057. The reversal of 400244404020 is 20404442004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12291379 + ... + 12323898.

It is an arithmetic number, because the mean of its divisors is an integer number (23433744656).

Almost surely, 2^400244404020 is an apocalyptic number.

It is an amenable number.

400244404020 is an abundant number, since it is smaller than the sum of its proper divisors (724575339468).

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

400244404020 is a wasteful number, since it uses less digits than its factorization.

400244404020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24615560 (or 24615558 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400244404020 its reverse (20404442004), we get a palindrome (420648846024).

The spelling of 400244404020 in words is "four hundred billion, two hundred forty-four million, four hundred four thousand, twenty".