840043344 has 80 divisors (see below), whose sum is σ = 2488412160. Its totient is φ = 239210880.

The previous prime is 840043327. The next prime is 840043381. The reversal of 840043344 is 443340048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100477 + ... + 108515.

It is an arithmetic number, because the mean of its divisors is an integer number (31105152).

Almost surely, 2^840043344 is an apocalyptic number.

840043344 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840043344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244206080).

840043344 is an abundant number, since it is smaller than the sum of its proper divisors (1648368816).

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

840043344 is a wasteful number, since it uses less digits than its factorization.

840043344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368 (or 8362 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 840043344 is about 28983.5012377732. The cubic root of 840043344 is about 943.5550246515. Note that the first 3 decimals are identical.

The spelling of 840043344 in words is "eight hundred forty million, forty-three thousand, three hundred forty-four".