804840404840 has 64 divisors (see below), whose sum is σ = 1891581500160. Its totient is φ = 307620149760.

The previous prime is 804840404827. The next prime is 804840404873. The reversal of 804840404840 is 48404048408.

It is a junction number, because it is equal to n+sod(n) for n = 804840404791 and 804840404800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437300 + ... + 1341980.

It is an arithmetic number, because the mean of its divisors is an integer number (29555960940).

Almost surely, 2^804840404840 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 804840404840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945790750080).

804840404840 is an abundant number, since it is smaller than the sum of its proper divisors (1086741095320).

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

804840404840 is a wasteful number, since it uses less digits than its factorization.

804840404840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905682 (or 905678 counting only the distinct ones).

The product of its (nonzero) digits is 524288, while the sum is 44.

The spelling of 804840404840 in words is "eight hundred four billion, eight hundred forty million, four hundred four thousand, eight hundred forty".