840287068 has 12 divisors (see below), whose sum is σ = 1472440032. Its totient is φ = 419589920.

The previous prime is 840287051. The next prime is 840287099. The reversal of 840287068 is 860782048.

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, 134980 + ... + 141067.

It is an arithmetic number, because the mean of its divisors is an integer number (122703336).

Almost surely, 2^840287068 is an apocalyptic number.

It is an amenable number.

840287068 is a deficient number, since it is larger than the sum of its proper divisors (632152964).

840287068 is a wasteful number, since it uses less digits than its factorization.

840287068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276812 (or 276810 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 840287068 is about 28987.7054628337. The cubic root of 840287068 is about 943.6462678672.

The spelling of 840287068 in words is "eight hundred forty million, two hundred eighty-seven thousand, sixty-eight".