840392307216 has 320 divisors, whose sum is σ = 3165754521600. Its totient is φ = 206794944000.

The previous prime is 840392307211. The next prime is 840392307229. The reversal of 840392307216 is 612703293048.

840392307216 is a `hidden beast` number, since 8 + 40 + 3 + 92 + 307 + 216 = 666.

It is not an unprimeable number, because it can be changed into a prime (840392307211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32835 + ... + 1296866.

It is an arithmetic number, because the mean of its divisors is an integer number (9892982880).

Almost surely, 2^840392307216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840392307216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582877260800).

840392307216 is an abundant number, since it is smaller than the sum of its proper divisors (2325362214384).

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

840392307216 is a wasteful number, since it uses less digits than its factorization.

840392307216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329755 (or 1329743 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 840392307216 in words is "eight hundred forty billion, three hundred ninety-two million, three hundred seven thousand, two hundred sixteen".