843280 has 40 divisors (see below), whose sum is σ = 1999872. Its totient is φ = 330624.

The previous prime is 843257. The next prime is 843289. The reversal of 843280 is 82348.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×843280² = 1422242316800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (843289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6577 + ... + 6703.

2⁸⁴³²⁸⁰ is an apocalyptic number.

843280 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 843280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999936).

843280 is an abundant number, since it is smaller than the sum of its proper divisors (1156592).

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

843280 is a wasteful number, since it uses less digits than its factorization.

843280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 843280 is about 918.3027823109. The cubic root of 843280 is about 94.4765299160.

It can be divided in two parts, 84 and 3280, that added together give a square (3364 = 58²).

The spelling of 843280 in words is "eight hundred forty-three thousand, two hundred eighty".