843920 has 80 divisors (see below), whose sum is σ = 2464128. Its totient is φ = 261120.

The previous prime is 843911. The next prime is 844001. The reversal of 843920 is 29348.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 843920.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 843920.

It is an unprimeable number.

843920 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6092 + ... + 6228.

2⁸⁴³⁹²⁰ is an apocalyptic number.

843920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 843920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232064).

843920 is an abundant number, since it is smaller than the sum of its proper divisors (1620208).

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

843920 is a wasteful number, since it uses less digits than its factorization.

843920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 843920 is about 918.6511851622. The cubic root of 843920 is about 94.5004245849.

It can be divided in two parts, 84 and 3920, that added together give a palindrome (4004).

The spelling of 843920 in words is "eight hundred forty-three thousand, nine hundred twenty".