804408400840 has 64 divisors (see below), whose sum is σ = 1998245712960. Its totient is φ = 288987889920.

The previous prime is 804408400799. The next prime is 804408400847. The reversal of 804408400840 is 48004804408.

It is a super-2 number, since 2×804408400840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 804408400793 and 804408400802.

It is not an unprimeable number, because it can be changed into a prime (804408400847) 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, 10976739 + ... + 11049778.

It is an arithmetic number, because the mean of its divisors is an integer number (31222589265).

Almost surely, 2^804408400840 is an apocalyptic number.

It is an amenable number.

804408400840 is an abundant number, since it is smaller than the sum of its proper divisors (1193837312120).

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

804408400840 is a wasteful number, since it uses less digits than its factorization.

804408400840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22026622 (or 22026618 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The spelling of 804408400840 in words is "eight hundred four billion, four hundred eight million, four hundred thousand, eight hundred forty".