40400004004 has 6 divisors (see below), whose sum is σ = 70700007014. Its totient is φ = 20200002000.

The previous prime is 40400003993. The next prime is 40400004079. The reversal of 40400004004 is 40040000404.

It can be written as a sum of positive squares in only one way, i.e., 26277058404 + 14122945600 = 162102^2 + 118840^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050000497 + ... + 5050000504.

Almost surely, 2^40400004004 is an apocalyptic number.

It is an amenable number.

40400004004 is a deficient number, since it is larger than the sum of its proper divisors (30300003010).

40400004004 is a wasteful number, since it uses less digits than its factorization.

40400004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100001005 (or 10100001003 counting only the distinct ones).

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

Adding to 40400004004 its reverse (40040000404), we get a palindrome (80440004408).

It can be divided in two parts, 4040000400 and 4, that added together give a palindrome (4040000404).

The spelling of 40400004004 in words is "forty billion, four hundred million, four thousand, four".