840404944 has 20 divisors (see below), whose sum is σ = 1629156640. Its totient is φ = 419977440.

The previous prime is 840404899. The next prime is 840404951. The reversal of 840404944 is 449404048.

840404944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19117 + ... + 45235.

It is an arithmetic number, because the mean of its divisors is an integer number (81457832).

Almost surely, 2^840404944 is an apocalyptic number.

It is an amenable number.

840404944 is a deficient number, since it is larger than the sum of its proper divisors (788751696).

840404944 is a wasteful number, since it uses less digits than its factorization.

840404944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28138 (or 28132 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 840404944 is about 28989.7385983386. The cubic root of 840404944 is about 943.6903909020.

The spelling of 840404944 in words is "eight hundred forty million, four hundred four thousand, nine hundred forty-four".