8000400004 has 12 divisors (see below), whose sum is σ = 14002607500. Its totient is φ = 3999655008.

The previous prime is 8000399993. The next prime is 8000400007. The reversal of 8000400004 is 4000040008.

It can be written as a sum of positive squares in 2 ways, for example, as 2758350400 + 5242049604 = 52520^2 + 72402^2 .

It is not an unprimeable number, because it can be changed into a prime (8000400007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 102279 + ... + 162670.

Almost surely, 2^8000400004 is an apocalyptic number.

It is an amenable number.

8000400004 is a deficient number, since it is larger than the sum of its proper divisors (6002207496).

8000400004 is a wasteful number, since it uses less digits than its factorization.

8000400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272502 (or 272500 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 8000400004 is about 89444.9551623791. The cubic root of 8000400004 is about 2000.0333331111.

The spelling of 8000400004 in words is "eight billion, four hundred thousand, four".