843220 has 48 divisors (see below), whose sum is σ = 2136960. Its totient is φ = 273024.

The previous prime is 843211. The next prime is 843229. The reversal of 843220 is 22348.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (843211) and next prime (843229).

It is a super-2 number, since 2×843220² = 1422039936800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2502 + ... + 2818.

It is an arithmetic number, because the mean of its divisors is an integer number (44520).

2⁸⁴³²²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 843220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1068480).

843220 is an abundant number, since it is smaller than the sum of its proper divisors (1293740).

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

843220 is a wasteful number, since it uses less digits than its factorization.

843220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 843220 is about 918.2701127664. The cubic root of 843220 is about 94.4742891711.

Adding to 843220 its reverse (22348), we get a palindrome (865568).

It can be divided in two parts, 84 and 3220, that multiplied together give a triangular number (270480 = T₇₃₅).

The spelling of 843220 in words is "eight hundred forty-three thousand, two hundred twenty".