840844884 has 24 divisors (see below), whose sum is σ = 2140332768. Its totient is φ = 254801440.

The previous prime is 840844883. The next prime is 840844889. The reversal of 840844884 is 488448048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840844883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3184887 + ... + 3185150.

It is an arithmetic number, because the mean of its divisors is an integer number (89180532).

Almost surely, 2^840844884 is an apocalyptic number.

It is an amenable number.

840844884 is an abundant number, since it is smaller than the sum of its proper divisors (1299487884).

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

840844884 is a wasteful number, since it uses less digits than its factorization.

840844884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6370055 (or 6370053 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 48.

The square root of 840844884 is about 28997.3254628767. The cubic root of 840844884 is about 943.8550316623.

The spelling of 840844884 in words is "eight hundred forty million, eight hundred forty-four thousand, eight hundred eighty-four".