840857940440 has 32 divisors (see below), whose sum is σ = 2162206133280. Its totient is φ = 288294150912.

The previous prime is 840857940437. The next prime is 840857940449. The reversal of 840857940440 is 44049758048.

840857940440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840857940449) 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, 1501531757 + ... + 1501532316.

It is an arithmetic number, because the mean of its divisors is an integer number (67568941665).

Almost surely, 2^840857940440 is an apocalyptic number.

It is an amenable number.

840857940440 is an abundant number, since it is smaller than the sum of its proper divisors (1321348192840).

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

840857940440 is a wasteful number, since it uses less digits than its factorization.

840857940440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003064091 (or 3003064087 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 840857940440 in words is "eight hundred forty billion, eight hundred fifty-seven million, nine hundred forty thousand, four hundred forty".