808400840440 has 32 divisors (see below), whose sum is σ = 1849730742000. Its totient is φ = 317879651584.

The previous prime is 808400840437. The next prime is 808400840461. The reversal of 808400840440 is 44048004808.

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 = 808400840393 and 808400840402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171269005 + ... + 171273724.

Almost surely, 2^808400840440 is an apocalyptic number.

It is an amenable number.

808400840440 is an abundant number, since it is smaller than the sum of its proper divisors (1041329901560).

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

808400840440 is a wasteful number, since it uses less digits than its factorization.

808400840440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342542799 (or 342542795 counting only the distinct ones).

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

The spelling of 808400840440 in words is "eight hundred eight billion, four hundred million, eight hundred forty thousand, four hundred forty".