1000400403404 has 6 divisors (see below), whose sum is σ = 1750700705964. Its totient is φ = 500200201700.

The previous prime is 1000400403391. The next prime is 1000400403413. The reversal of 1000400403404 is 4043040040001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125050050422 + ... + 125050050429.

It is an arithmetic number, because the mean of its divisors is an integer number (291783450994).

Almost surely, 2^{1000400403404} is an apocalyptic number.

It is an amenable number.

1000400403404 is a deficient number, since it is larger than the sum of its proper divisors (750300302560).

1000400403404 is a wasteful number, since it uses less digits than its factorization.

1000400403404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250100100855 (or 250100100853 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 1000400403404 its reverse (4043040040001), we get a palindrome (5043440443405).

The spelling of 1000400403404 in words is "one trillion, four hundred million, four hundred three thousand, four hundred four".