843864 has 32 divisors (see below), whose sum is σ = 2411520. Its totient is φ = 241056.

The previous prime is 843841. The next prime is 843881. The reversal of 843864 is 468348.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

843864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2344 + ... + 2679.

It is an arithmetic number, because the mean of its divisors is an integer number (75360).

2⁸⁴³⁸⁶⁴ is an apocalyptic number.

843864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

843864 is an abundant number, since it is smaller than the sum of its proper divisors (1567656).

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

843864 is a wasteful number, since it uses less digits than its factorization.

843864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5035 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 843864 is about 918.6207051879. The cubic root of 843864 is about 94.4983342838.

The spelling of 843864 in words is "eight hundred forty-three thousand, eight hundred sixty-four".