808400008444 has 36 divisors (see below), whose sum is σ = 1676721871944. Its totient is φ = 339920214816.

The previous prime is 808400008387. The next prime is 808400008459. The reversal of 808400008444 is 444800004808.

It is a super-2 number, since 2×808400008444² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 808400008397 and 808400008406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38899894 + ... + 38920669.

It is an arithmetic number, because the mean of its divisors is an integer number (46575607554).

Almost surely, 2^808400008444 is an apocalyptic number.

It is an amenable number.

808400008444 is an abundant number, since it is smaller than the sum of its proper divisors (868321863500).

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

808400008444 is a wasteful number, since it uses less digits than its factorization.

808400008444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77820634 (or 77820625 counting only the distinct ones).

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

The spelling of 808400008444 in words is "eight hundred eight billion, four hundred million, eight thousand, four hundred forty-four".