312818 has 16 divisors (see below), whose sum is σ = 522720. Its totient is φ = 139200.

The previous prime is 312799. The next prime is 312839. The reversal of 312818 is 818213.

It is a super-2 number, since 2×312818² = 195710202248, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 312793 and 312802.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178 + ... + 1418.

It is an arithmetic number, because the mean of its divisors is an integer number (32670).

2³¹²⁸¹⁸ is an apocalyptic number.

312818 is a deficient number, since it is larger than the sum of its proper divisors (209902).

312818 is a wasteful number, since it uses less digits than its factorization.

312818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 384, while the sum is 23.

The square root of 312818 is about 559.3013499000. The cubic root of 312818 is about 67.8834508729.

It can be divided in two parts, 3 and 12818, that added together give a palindrome (12821).

The spelling of 312818 in words is "three hundred twelve thousand, eight hundred eighteen".