840342444 has 48 divisors (see below), whose sum is σ = 2050030080. Its totient is φ = 267414400.

The previous prime is 840342427. The next prime is 840342449. The reversal of 840342444 is 444243048.

840342444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (840342449) 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, 154369 + ... + 159719.

It is an arithmetic number, because the mean of its divisors is an integer number (42708960).

Almost surely, 2^840342444 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 840342444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025015040).

840342444 is an abundant number, since it is smaller than the sum of its proper divisors (1209687636).

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

840342444 is a wasteful number, since it uses less digits than its factorization.

840342444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950 (or 5948 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 33.

The square root of 840342444 is about 28988.6606106595. The cubic root of 840342444 is about 943.6669965800. Note that the first 3 decimals are identical.

The spelling of 840342444 in words is "eight hundred forty million, three hundred forty-two thousand, four hundred forty-four".