804400404040 has 64 divisors (see below), whose sum is σ = 1821743861760. Its totient is φ = 319659137280.

The previous prime is 804400404019. The next prime is 804400404047. The reversal of 804400404040 is 40404004408.

It is not an unprimeable number, because it can be changed into a prime (804400404047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5837617 + ... + 5973823.

It is an arithmetic number, because the mean of its divisors is an integer number (28464747840).

Almost surely, 2^804400404040 is an apocalyptic number.

It is an amenable number.

804400404040 is an abundant number, since it is smaller than the sum of its proper divisors (1017343457720).

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

804400404040 is a wasteful number, since it uses less digits than its factorization.

804400404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137182 (or 137178 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 804400404040 its reverse (40404004408), we get a palindrome (844804408448).

The spelling of 804400404040 in words is "eight hundred four billion, four hundred million, four hundred four thousand, forty".