312618 has 8 divisors (see below), whose sum is σ = 625248. Its totient is φ = 104204.

The previous prime is 312617. The next prime is 312619. The reversal of 312618 is 816213.

It is an interprime number because it is at equal distance from previous prime (312617) and next prime (312619).

It is a sphenic number, since it is the product of 3 distinct primes.

312618 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 312594 and 312603.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312618.

It is not an unprimeable number, because it can be changed into a prime (312617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26046 + ... + 26057.

It is an arithmetic number, because the mean of its divisors is an integer number (78156).

2³¹²⁶¹⁸ is an apocalyptic number.

312618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312618 is a wasteful number, since it uses less digits than its factorization.

312618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52108.

The product of its digits is 288, while the sum is 21.

The square root of 312618 is about 559.1225268222. The cubic root of 312618 is about 67.8689807075.

It can be divided in two parts, 3 and 12618, that added together give a palindrome (12621).

The spelling of 312618 in words is "three hundred twelve thousand, six hundred eighteen".