318424 has 16 divisors (see below), whose sum is σ = 609120. Its totient is φ = 156000.

The previous prime is 318419. The next prime is 318431. The reversal of 318424 is 424813.

It is a junction number, because it is equal to n+sod(n) for n = 318395 and 318404.

It is a congruent number.

It is an unprimeable number.

318424 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 3 ways as a sum of consecutive naturals, for example, 49 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (38070).

2³¹⁸⁴²⁴ is an apocalyptic number.

It is an amenable number.

318424 is a deficient number, since it is larger than the sum of its proper divisors (290696).

318424 is a wasteful number, since it uses less digits than its factorization.

318424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 806 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 318424 is about 564.2907052221. The cubic root of 318424 is about 68.2865646004.

The spelling of 318424 in words is "three hundred eighteen thousand, four hundred twenty-four".