840772180 has 12 divisors (see below), whose sum is σ = 1765621620. Its totient is φ = 336308864.

The previous prime is 840772157. The next prime is 840772181. The reversal of 840772180 is 81277048.

It can be written as a sum of positive squares in 2 ways, for example, as 441252036 + 399520144 = 21006^2 + 19988^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840772181) 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 3 ways as a sum of consecutive naturals, for example, 21019285 + ... + 21019324.

It is an arithmetic number, because the mean of its divisors is an integer number (147135135).

Almost surely, 2^840772180 is an apocalyptic number.

It is an amenable number.

840772180 is an abundant number, since it is smaller than the sum of its proper divisors (924849440).

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

840772180 is a wasteful number, since it uses less digits than its factorization.

840772180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42038618 (or 42038616 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 840772180 is about 28996.0718029184. The cubic root of 840772180 is about 943.8278272732.

The spelling of 840772180 in words is "eight hundred forty million, seven hundred seventy-two thousand, one hundred eighty".