8400404040 has 64 divisors (see below), whose sum is σ = 28801388160. Its totient is φ = 1920092160.

The previous prime is 8400404003. The next prime is 8400404069. The reversal of 8400404040 is 404040048.

It is a Harshad number since it is a multiple of its sum of digits (24).

8400404040 is a modest number, since divided by 404040 gives 8400 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 8400404040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4999401 + ... + 5001080.

It is an arithmetic number, because the mean of its divisors is an integer number (450021690).

Almost surely, 2^8400404040 is an apocalyptic number.

It is an amenable number.

8400404040 is an abundant number, since it is smaller than the sum of its proper divisors (20400984120).

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

8400404040 is a wasteful number, since it uses less digits than its factorization.

8400404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000502 (or 10000498 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 8400404040 is about 91653.7180915210. The cubic root of 8400404040 is about 2032.8253055503.

Adding to 8400404040 its reverse (404040048), we get a palindrome (8804444088).

The spelling of 8400404040 in words is "eight billion, four hundred million, four hundred four thousand, forty".