840820132 has 12 divisors (see below), whose sum is σ = 1491592396. Its totient is φ = 414650880.

The previous prime is 840820111. The next prime is 840820139. The reversal of 840820132 is 231028048.

840820132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 647498916 + 193321216 = 25446^2 + 13904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 840820132.

It is not an unprimeable number, because it can be changed into a prime (840820139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439469 + ... + 1440052.

Almost surely, 2^840820132 is an apocalyptic number.

It is an amenable number.

840820132 is a deficient number, since it is larger than the sum of its proper divisors (650772264).

840820132 is a wasteful number, since it uses less digits than its factorization.

840820132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879598 (or 2879596 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 840820132 is about 28996.8986617535. The cubic root of 840820132 is about 943.8457701328.

The spelling of 840820132 in words is "eight hundred forty million, eight hundred twenty thousand, one hundred thirty-two".