840043338 has 32 divisors (see below), whose sum is σ = 1827002304. Its totient is φ = 256419072.

The previous prime is 840043327. The next prime is 840043381. The reversal of 840043338 is 833340048.

It is a junction number, because it is equal to n+sod(n) for n = 840043299 and 840043308.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 107520 + ... + 115067.

It is an arithmetic number, because the mean of its divisors is an integer number (57093822).

Almost surely, 2^840043338 is an apocalyptic number.

840043338 is an abundant number, since it is smaller than the sum of its proper divisors (986958966).

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

840043338 is a wasteful number, since it uses less digits than its factorization.

840043338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222646.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 840043338 is about 28983.5011342660. The cubic root of 840043338 is about 943.5550224050. Note that the first 3 decimals are identical.

The spelling of 840043338 in words is "eight hundred forty million, forty-three thousand, three hundred thirty-eight".