312918 has 8 divisors (see below), whose sum is σ = 625848. Its totient is φ = 104304.

The previous prime is 312899. The next prime is 312929. The reversal of 312918 is 819213.

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

312918 is an admirable number.

It is a Curzon number.

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 312918.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26071 + ... + 26082.

It is an arithmetic number, because the mean of its divisors is an integer number (78231).

2³¹²⁹¹⁸ is an apocalyptic number.

312918 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.

312918 is a wasteful number, since it uses less digits than its factorization.

312918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52158.

The product of its digits is 432, while the sum is 24.

The square root of 312918 is about 559.3907400020. The cubic root of 312918 is about 67.8906836428.

It can be divided in two parts, 3 and 12918, that added together give a palindrome (12921).

The spelling of 312918 in words is "three hundred twelve thousand, nine hundred eighteen".