40400040004 has 12 divisors (see below), whose sum is σ = 70825651344. Its totient is φ = 20164139624.

The previous prime is 40400039987. The next prime is 40400040029. The reversal of 40400040004 is 40004000404.

40400040004 is a modest number, since divided by 40004 gives 404 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 40400040004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8967562 + ... + 8972065.

It is an arithmetic number, because the mean of its divisors is an integer number (5902137612).

Almost surely, 2^40400040004 is an apocalyptic number.

It is an amenable number.

40400040004 is a deficient number, since it is larger than the sum of its proper divisors (30425611340).

40400040004 is a wasteful number, since it uses less digits than its factorization.

40400040004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17940194 (or 17940192 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40400040004 its reverse (40004000404), we get a palindrome (80404040408).

The spelling of 40400040004 in words is "forty billion, four hundred million, forty thousand, four".