840063220 has 24 divisors (see below), whose sum is σ = 1765209600. Its totient is φ = 335820192.

The previous prime is 840063199. The next prime is 840063221. The reversal of 840063220 is 22360048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840063221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23241 + ... + 47119.

It is an arithmetic number, because the mean of its divisors is an integer number (73550400).

Almost surely, 2^840063220 is an apocalyptic number.

It is an amenable number.

840063220 is an abundant number, since it is smaller than the sum of its proper divisors (925146380).

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

840063220 is a wasteful number, since it uses less digits than its factorization.

840063220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25647 (or 25645 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 840063220 is about 28983.8441204751. The cubic root of 840063220 is about 943.5624663118.

The spelling of 840063220 in words is "eight hundred forty million, sixty-three thousand, two hundred twenty".