318386 has 4 divisors (see below), whose sum is σ = 477582. Its totient is φ = 159192.

The previous prime is 318377. The next prime is 318403. The reversal of 318386 is 683813.

318386 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 87025 = 481^2 + 295^2 .

It is a Curzon number.

It is an unprimeable number.

318386 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 as a sum of consecutive naturals, namely, 79595 + ... + 79598.

2³¹⁸³⁸⁶ is an apocalyptic number.

318386 is a deficient number, since it is larger than the sum of its proper divisors (159196).

318386 is a wasteful number, since it uses less digits than its factorization.

318386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159195.

The product of its digits is 3456, while the sum is 29.

The square root of 318386 is about 564.2570336292. The cubic root of 318386 is about 68.2838481043.

The spelling of 318386 in words is "three hundred eighteen thousand, three hundred eighty-six".