840894 has 16 divisors (see below), whose sum is σ = 1691280. Its totient is φ = 278720.

The previous prime is 840863. The next prime is 840907. The reversal of 840894 is 498048.

840894 = 457² + 458² + ... + 460².

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, 1354 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (105705).

2⁸⁴⁰⁸⁹⁴ is an apocalyptic number.

840894 is an abundant number, since it is smaller than the sum of its proper divisors (850386).

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

840894 is a wasteful number, since it uses less digits than its factorization.

840894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 840894 is about 917.0027262773. The cubic root of 840894 is about 94.3873409004.

The spelling of 840894 in words is "eight hundred forty thousand, eight hundred ninety-four".