318423 has 16 divisors (see below), whose sum is σ = 495360. Its totient is φ = 178176.

The previous prime is 318419. The next prime is 318431. The reversal of 318423 is 324813.

It is a happy number.

It is not a de Polignac number, because 318423 - 2² = 318419 is a prime.

It is a super-4 number, since 4×318423⁴ (a number of 23 digits) contains 4444 as substring.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 318423.

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 318423.

It is not an unprimeable number, because it can be changed into a prime (318403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (30960).

2³¹⁸⁴²³ is an apocalyptic number.

318423 is a deficient number, since it is larger than the sum of its proper divisors (176937).

318423 is a wasteful number, since it uses less digits than its factorization.

318423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326.

The product of its digits is 576, while the sum is 21.

The square root of 318423 is about 564.2898191532. The cubic root of 318423 is about 68.2864931164.

It can be divided in two parts, 318 and 423, that added together give a triangular number (741 = T₃₈).

The spelling of 318423 in words is "three hundred eighteen thousand, four hundred twenty-three".