840056 has 24 divisors (see below), whose sum is σ = 1833120. Its totient is φ = 359856.

The previous prime is 840053. The next prime is 840061. The reversal of 840056 is 650048.

840056 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 (840053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (76380).

2⁸⁴⁰⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

840056 is an abundant number, since it is smaller than the sum of its proper divisors (993064).

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

840056 is a wasteful number, since it uses less digits than its factorization.

840056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 840056 is about 916.5456889866. The cubic root of 840056 is about 94.3559763126.

The spelling of 840056 in words is "eight hundred forty thousand, fifty-six".