840044408404 has 12 divisors (see below), whose sum is σ = 1473294518164. Its totient is φ = 419103117504.

The previous prime is 840044408393. The next prime is 840044408417. The reversal of 840044408404 is 404804440048.

It can be written as a sum of positive squares in 2 ways, for example, as 583005548304 + 257038860100 = 763548^2 + 506990^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229769619 + ... + 229773274.

Almost surely, 2^840044408404 is an apocalyptic number.

It is an amenable number.

840044408404 is a deficient number, since it is larger than the sum of its proper divisors (633250109760).

840044408404 is a wasteful number, since it uses less digits than its factorization.

840044408404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459543354 (or 459543352 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 40.

The spelling of 840044408404 in words is "eight hundred forty billion, forty-four million, four hundred eight thousand, four hundred four".