840115340 has 24 divisors (see below), whose sum is σ = 1811926032. Its totient is φ = 326963520.

The previous prime is 840115327. The next prime is 840115387. The reversal of 840115340 is 43511048.

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 7 ways as a sum of consecutive naturals, for example, 566906 + ... + 568385.

It is an arithmetic number, because the mean of its divisors is an integer number (75496918).

Almost surely, 2^840115340 is an apocalyptic number.

It is an amenable number.

840115340 is an abundant number, since it is smaller than the sum of its proper divisors (971810692).

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

840115340 is a wasteful number, since it uses less digits than its factorization.

840115340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135337 (or 1135335 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 840115340 is about 28984.7432281192. The cubic root of 840115340 is about 943.5819797078.

Adding to 840115340 its reverse (43511048), we get a palindrome (883626388).

The spelling of 840115340 in words is "eight hundred forty million, one hundred fifteen thousand, three hundred forty".