840408404484 has 72 divisors (see below), whose sum is σ = 2155608054880. Its totient is φ = 254647895040.

The previous prime is 840408404471. The next prime is 840408404509. The reversal of 840408404484 is 484404804048.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31028772 + ... + 31055844.

Almost surely, 2^840408404484 is an apocalyptic number.

It is an amenable number.

840408404484 is an abundant number, since it is smaller than the sum of its proper divisors (1315199650396).

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

840408404484 is a wasteful number, since it uses less digits than its factorization.

840408404484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48481 (or 48468 counting only the distinct ones).

The product of its (nonzero) digits is 2097152, while the sum is 48.

The spelling of 840408404484 in words is "eight hundred forty billion, four hundred eight million, four hundred four thousand, four hundred eighty-four".