840005916 has 12 divisors (see below), whose sum is σ = 1960013832. Its totient is φ = 280001968.

The previous prime is 840005893. The next prime is 840005917. The reversal of 840005916 is 619500048.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840005917) 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 3 ways as a sum of consecutive naturals, for example, 35000235 + ... + 35000258.

It is an arithmetic number, because the mean of its divisors is an integer number (163334486).

Almost surely, 2^840005916 is an apocalyptic number.

It is an amenable number.

840005916 is an abundant number, since it is smaller than the sum of its proper divisors (1120007916).

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

840005916 is a wasteful number, since it uses less digits than its factorization.

840005916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70000500 (or 70000498 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 840005916 is about 28982.8555528954. The cubic root of 840005916 is about 943.5410111278.

The spelling of 840005916 in words is "eight hundred forty million, five thousand, nine hundred sixteen".