400400408404 has 6 divisors (see below), whose sum is σ = 700700714714. Its totient is φ = 200200204200.

The previous prime is 400400408399. The next prime is 400400408413. The reversal of 400400408404 is 404804004004.

It can be written as a sum of positive squares in only one way, i.e., 372102440004 + 28297968400 = 610002^2 + 168220^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 50050051047 + ... + 50050051054.

Almost surely, 2^400400408404 is an apocalyptic number.

It is an amenable number.

400400408404 is a deficient number, since it is larger than the sum of its proper divisors (300300306310).

400400408404 is a wasteful number, since it uses less digits than its factorization.

400400408404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100100102105 (or 100100102103 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The spelling of 400400408404 in words is "four hundred billion, four hundred million, four hundred eight thousand, four hundred four".