840822081 has 16 divisors (see below), whose sum is σ = 1224358848. Its totient is φ = 509028800.

The previous prime is 840822007. The next prime is 840822089. The reversal of 840822081 is 180228048.

840822081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 840822081 - 2¹⁴ = 840805697 is a prime.

It is a super-3 number, since 3×840822081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840822089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17515 + ... + 44591.

It is an arithmetic number, because the mean of its divisors is an integer number (76522428).

Almost surely, 2^840822081 is an apocalyptic number.

It is an amenable number.

840822081 is a deficient number, since it is larger than the sum of its proper divisors (383536767).

840822081 is a wasteful number, since it uses less digits than its factorization.

840822081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28032.

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 840822081 is about 28996.9322687763. The cubic root of 840822081 is about 943.8464994026.

The spelling of 840822081 in words is "eight hundred forty million, eight hundred twenty-two thousand, eighty-one".