843402 has 32 divisors (see below), whose sum is σ = 1976832. Its totient is φ = 234864.

The previous prime is 843397. The next prime is 843443. The reversal of 843402 is 204348.

It is a happy number.

It is a super-2 number, since 2×843402² = 1422653867208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 843402.

It is an unprimeable number.

843402 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573 + ... + 2039.

It is an arithmetic number, because the mean of its divisors is an integer number (61776).

2⁸⁴³⁴⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 843402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988416).

843402 is an abundant number, since it is smaller than the sum of its proper divisors (1133430).

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

843402 is a wasteful number, since it uses less digits than its factorization.

843402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 843402 is about 918.3692068008. The cubic root of 843402 is about 94.4810857697.

It can be divided in two parts, 84 and 3402, that added together give a triangular number (3486 = T₈₃).

The spelling of 843402 in words is "eight hundred forty-three thousand, four hundred two".