400400804048 has 80 divisors (see below), whose sum is σ = 896123775360. Its totient is φ = 169762272768.

The previous prime is 400400804047. The next prime is 400400804057. The reversal of 400400804048 is 840408004004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400400804047) 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, 7946711 + ... + 7996937.

It is an arithmetic number, because the mean of its divisors is an integer number (11201547192).

Almost surely, 2^400400804048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400400804048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448061887680).

400400804048 is an abundant number, since it is smaller than the sum of its proper divisors (495722971312).

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

400400804048 is a wasteful number, since it uses less digits than its factorization.

400400804048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51004 (or 50998 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 400400804048 in words is "four hundred billion, four hundred million, eight hundred four thousand, forty-eight".