400040364004 has 24 divisors (see below), whose sum is σ = 718917292800. Its totient is φ = 194706744960.

The previous prime is 400040363971. The next prime is 400040364007. The reversal of 400040364004 is 400463040004.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 400040364004.

It is not an unprimeable number, because it can be changed into a prime (400040364007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8892709 + ... + 8937580.

It is an arithmetic number, because the mean of its divisors is an integer number (29954887200).

Almost surely, 2^400040364004 is an apocalyptic number.

It is an amenable number.

400040364004 is a deficient number, since it is larger than the sum of its proper divisors (318876928796).

400040364004 is a wasteful number, since it uses less digits than its factorization.

400040364004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17830443 (or 17830441 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The spelling of 400040364004 in words is "four hundred billion, forty million, three hundred sixty-four thousand, four".