400040404039 has 4 divisors (see below), whose sum is σ = 413834900760. Its totient is φ = 386245907320.

The previous prime is 400040404031. The next prime is 400040404051. The reversal of 400040404039 is 930404040004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400040404039 - 2³ = 400040404031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400040403998 and 400040404016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040404031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6897248317 + ... + 6897248374.

It is an arithmetic number, because the mean of its divisors is an integer number (103458725190).

Almost surely, 2^400040404039 is an apocalyptic number.

400040404039 is a deficient number, since it is larger than the sum of its proper divisors (13794496721).

400040404039 is a wasteful number, since it uses less digits than its factorization.

400040404039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13794496720.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 400040404039 in words is "four hundred billion, forty million, four hundred four thousand, thirty-nine".