840798 has 24 divisors (see below), whose sum is σ = 2082288. Its totient is φ = 240192.

The previous prime is 840767. The next prime is 840817. The reversal of 840798 is 897048.

840798 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

840798 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 3211 + ... + 3462.

It is an arithmetic number, because the mean of its divisors is an integer number (86762).

2⁸⁴⁰⁷⁹⁸ is an apocalyptic number.

840798 is an abundant number, since it is smaller than the sum of its proper divisors (1241490).

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

840798 is a wasteful number, since it uses less digits than its factorization.

840798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688 (or 6685 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 840798 is about 916.9503803369. The cubic root of 840798 is about 94.3837488783.

The spelling of 840798 in words is "eight hundred forty thousand, seven hundred ninety-eight".