840456056 has 32 divisors (see below), whose sum is σ = 1723075200. Its totient is φ = 381145440.

The previous prime is 840456037. The next prime is 840456061. The reversal of 840456056 is 650654048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28205 + ... + 49763.

It is an arithmetic number, because the mean of its divisors is an integer number (53846100).

Almost surely, 2^840456056 is an apocalyptic number.

It is an amenable number.

840456056 is an abundant number, since it is smaller than the sum of its proper divisors (882619144).

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

840456056 is a wasteful number, since it uses less digits than its factorization.

840456056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22019 (or 22015 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 840456056 is about 28990.6201382447. The cubic root of 840456056 is about 943.7095217292.

The spelling of 840456056 in words is "eight hundred forty million, four hundred fifty-six thousand, fifty-six".