840444808 has 16 divisors (see below), whose sum is σ = 1800953280. Its totient is φ = 360190608.

The previous prime is 840444791. The next prime is 840444809. The reversal of 840444808 is 808444048.

It is not an unprimeable number, because it can be changed into a prime (840444809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7503916 + ... + 7504027.

It is an arithmetic number, because the mean of its divisors is an integer number (112559580).

Almost surely, 2^840444808 is an apocalyptic number.

It is an amenable number.

840444808 is an abundant number, since it is smaller than the sum of its proper divisors (960508472).

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

840444808 is a wasteful number, since it uses less digits than its factorization.

840444808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15007956 (or 15007952 counting only the distinct ones).

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

The square root of 840444808 is about 28990.4261438151. The cubic root of 840444808 is about 943.7053117562.

The spelling of 840444808 in words is "eight hundred forty million, four hundred forty-four thousand, eight hundred eight".