800040440440 has 64 divisors (see below), whose sum is σ = 1816773235200. Its totient is φ = 317062942848.

The previous prime is 800040440431. The next prime is 800040440461. The reversal of 800040440440 is 44044040008.

It is a junction number, because it is equal to n+sod(n) for n = 800040440399 and 800040440408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1855701 + ... + 2245819.

It is an arithmetic number, because the mean of its divisors is an integer number (28387081800).

Almost surely, 2^800040440440 is an apocalyptic number.

It is an amenable number.

800040440440 is an abundant number, since it is smaller than the sum of its proper divisors (1016732794760).

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

800040440440 is a wasteful number, since it uses less digits than its factorization.

800040440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390604 (or 390600 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 800040440440 its reverse (44044040008), we get a palindrome (844084480448).

The spelling of 800040440440 in words is "eight hundred billion, forty million, four hundred forty thousand, four hundred forty".