400404440004 has 12 divisors (see below), whose sum is σ = 934277026704. Its totient is φ = 133468146664.

The previous prime is 400404439973. The next prime is 400404440011. The reversal of 400404440004 is 400044404004.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16683518322 + ... + 16683518345.

It is an arithmetic number, because the mean of its divisors is an integer number (77856418892).

Almost surely, 2^400404440004 is an apocalyptic number.

It is an amenable number.

400404440004 is an abundant number, since it is smaller than the sum of its proper divisors (533872586700).

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

400404440004 is a wasteful number, since it uses less digits than its factorization.

400404440004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33367036674 (or 33367036672 counting only the distinct ones).

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

Adding to 400404440004 its reverse (400044404004), we get a palindrome (800448844008).

The spelling of 400404440004 in words is "four hundred billion, four hundred four million, four hundred forty thousand, four".