400040404404 has 12 divisors (see below), whose sum is σ = 933427610304. Its totient is φ = 133346801464.

The previous prime is 400040404399. The next prime is 400040404409. The reversal of 400040404404 is 404404040004.

It is an interprime number because it is at equal distance from previous prime (400040404399) and next prime (400040404409).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040404409) 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, 16668350172 + ... + 16668350195.

It is an arithmetic number, because the mean of its divisors is an integer number (77785634192).

Almost surely, 2^400040404404 is an apocalyptic number.

It is an amenable number.

400040404404 is an abundant number, since it is smaller than the sum of its proper divisors (533387205900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400040404404 is a wasteful number, since it uses less digits than its factorization.

400040404404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33336700374 (or 33336700372 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400040404404 its reverse (404404040004), we get a palindrome (804444444408).

The spelling of 400040404404 in words is "four hundred billion, forty million, four hundred four thousand, four hundred four".