840422660 has 96 divisors (see below), whose sum is σ = 2207858688. Its totient is φ = 261060480.

The previous prime is 840422641. The next prime is 840422677. The reversal of 840422660 is 66224048.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 564437 + ... + 565923.

It is an arithmetic number, because the mean of its divisors is an integer number (22998528).

Almost surely, 2^840422660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840422660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103929344).

840422660 is an abundant number, since it is smaller than the sum of its proper divisors (1367436028).

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

840422660 is a wasteful number, since it uses less digits than its factorization.

840422660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 840422660 is about 28990.0441531226. The cubic root of 840422660 is about 943.6970219519.

The spelling of 840422660 in words is "eight hundred forty million, four hundred twenty-two thousand, six hundred sixty".