1040040004 has 6 divisors (see below), whose sum is σ = 1820070014. Its totient is φ = 520020000.

The previous prime is 1040039981. The next prime is 1040040007. The reversal of 1040040004 is 4000400401.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 879003904 + 161036100 = 29648^2 + 12690^2 .

It is not an unprimeable number, because it can be changed into a prime (1040040007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130004997 + ... + 130005004.

Almost surely, 2^1040040004 is an apocalyptic number.

It is an amenable number.

1040040004 is a deficient number, since it is larger than the sum of its proper divisors (780030010).

1040040004 is a wasteful number, since it uses less digits than its factorization.

1040040004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260010005 (or 260010003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1040040004 is about 32249.6512229202. The cubic root of 1040040004 is about 1013.1723941757.

Adding to 1040040004 its reverse (4000400401), we get a palindrome (5040440405).

The spelling of 1040040004 in words is "one billion, forty million, forty thousand, four".