318418 has 4 divisors (see below), whose sum is σ = 477630. Its totient is φ = 159208.

The previous prime is 318407. The next prime is 318419. The reversal of 318418 is 814813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814813 = 29 ⋅28097.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 127449 = 437^2 + 357^2 .

It is a junction number, because it is equal to n+sod(n) for n = 318392 and 318401.

It is not an unprimeable number, because it can be changed into a prime (318419) by changing a digit.

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 as a sum of consecutive naturals, namely, 79603 + ... + 79606.

2³¹⁸⁴¹⁸ is an apocalyptic number.

318418 is a deficient number, since it is larger than the sum of its proper divisors (159212).

318418 is a wasteful number, since it uses less digits than its factorization.

318418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159211.

The product of its digits is 768, while the sum is 25.

The square root of 318418 is about 564.2853887883. The cubic root of 318418 is about 68.2861356943.

The spelling of 318418 in words is "three hundred eighteen thousand, four hundred eighteen".