840963940 has 72 divisors (see below), whose sum is σ = 1875114360. Its totient is φ = 316763136.

The previous prime is 840963931. The next prime is 840963941. The reversal of 840963940 is 49369048.

It can be written as a sum of positive squares in 4 ways, for example, as 22202944 + 818760996 = 4712^2 + 28614^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840963941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1941964 + ... + 1942396.

It is an arithmetic number, because the mean of its divisors is an integer number (26043255).

Almost surely, 2^840963940 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 840963940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937557180).

840963940 is an abundant number, since it is smaller than the sum of its proper divisors (1034150420).

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

840963940 is a wasteful number, since it uses less digits than its factorization.

840963940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 840963940 is about 28999.3782691974. The cubic root of 840963940 is about 943.8995766605.

The spelling of 840963940 in words is "eight hundred forty million, nine hundred sixty-three thousand, nine hundred forty".