840838842 has 12 divisors (see below), whose sum is σ = 1821817530. Its totient is φ = 280279608.

The previous prime is 840838841. The next prime is 840838877. The reversal of 840838842 is 248838048.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 722050641 + 118788201 = 26871^2 + 10899^2 .

It is not an unprimeable number, because it can be changed into a prime (840838841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23356617 + ... + 23356652.

Almost surely, 2^840838842 is an apocalyptic number.

840838842 is an abundant number, since it is smaller than the sum of its proper divisors (980978688).

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

840838842 is a wasteful number, since it uses less digits than its factorization.

840838842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46713277 (or 46713274 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The square root of 840838842 is about 28997.2212806676. The cubic root of 840838842 is about 943.8527709260.

The spelling of 840838842 in words is "eight hundred forty million, eight hundred thirty-eight thousand, eight hundred forty-two".