840868 has 24 divisors (see below), whose sum is σ = 1713600. Its totient is φ = 353568.

The previous prime is 840863. The next prime is 840907. The reversal of 840868 is 868048.

It is not an unprimeable number, because it can be changed into a prime (840863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (71400).

2⁸⁴⁰⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

840868 is an abundant number, since it is smaller than the sum of its proper divisors (872732).

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

840868 is a wasteful number, since it uses less digits than its factorization.

840868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 840868 is about 916.9885495468. The cubic root of 840868 is about 94.3863680881.

The spelling of 840868 in words is "eight hundred forty thousand, eight hundred sixty-eight".