840884 has 24 divisors (see below), whose sum is σ = 1663200. Its totient is φ = 368480.

The previous prime is 840863. The next prime is 840907. The reversal of 840884 is 488048.

840884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 840884.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (69300).

2⁸⁴⁰⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

840884 is a deficient number, since it is larger than the sum of its proper divisors (822316).

840884 is a wasteful number, since it uses less digits than its factorization.

840884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 840884 is about 916.9972737146. The cubic root of 840884 is about 94.3869667442.

Subtracting from 840884 its reverse (488048), we obtain a square (352836 = 594²).

The spelling of 840884 in words is "eight hundred forty thousand, eight hundred eighty-four".