843128 has 48 divisors (see below), whose sum is σ = 1899240. Its totient is φ = 348480.

The previous prime is 843127. The next prime is 843131. The reversal of 843128 is 821348.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 843097 and 843106.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 843128.

It is not an unprimeable number, because it can be changed into a prime (843127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12551 + ... + 12617.

2⁸⁴³¹²⁸ is an apocalyptic number.

843128 is a gapful number since it is divisible by the number (88) 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 843128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949620).

843128 is an abundant number, since it is smaller than the sum of its proper divisors (1056112).

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

843128 is a wasteful number, since it uses less digits than its factorization.

843128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 93 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 843128 is about 918.2200172072. The cubic root of 843128 is about 94.4708531557.

The spelling of 843128 in words is "eight hundred forty-three thousand, one hundred twenty-eight".