84424 has 16 divisors (see below), whose sum is σ = 161820. Its totient is φ = 41280.

The previous prime is 84421. The next prime is 84431. The reversal of 84424 is 42448.

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 324 = 290^2 + 18^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 84395 and 84404.

It is not an unprimeable number, because it can be changed into a prime (84421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402 + ... + 574.

2⁸⁴⁴²⁴ is an apocalyptic number.

It is an amenable number.

84424 is a deficient number, since it is larger than the sum of its proper divisors (77396).

84424 is a wasteful number, since it uses less digits than its factorization.

84424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 236 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 84424 is about 290.5580836941. The cubic root of 84424 is about 43.8687549113.

It can be divided in two parts, 844 and 24, that added together give a palindrome (868).

The spelling of 84424 in words is "eighty-four thousand, four hundred twenty-four".