840395868 has 24 divisors (see below), whose sum is σ = 2111764368. Its totient is φ = 258583296.

The previous prime is 840395863. The next prime is 840395887. The reversal of 840395868 is 868593048.

840395868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 840395868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840395863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2693421 + ... + 2693732.

It is an arithmetic number, because the mean of its divisors is an integer number (87990182).

Almost surely, 2^840395868 is an apocalyptic number.

It is an amenable number.

840395868 is an abundant number, since it is smaller than the sum of its proper divisors (1271368500).

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

840395868 is a wasteful number, since it uses less digits than its factorization.

840395868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387173 (or 5387171 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 840395868 is about 28989.5820597676. The cubic root of 840395868 is about 943.6869937441.

The spelling of 840395868 in words is "eight hundred forty million, three hundred ninety-five thousand, eight hundred sixty-eight".