312878 has 8 divisors (see below), whose sum is σ = 475968. Its totient is φ = 154224.

The previous prime is 312863. The next prime is 312887. The reversal of 312878 is 878213.

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

It is a self number, because there is not a number n which added to its sum of digits gives 312878.

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 312878.

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, 926 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (59496).

2³¹²⁸⁷⁸ is an apocalyptic number.

312878 is a deficient number, since it is larger than the sum of its proper divisors (163090).

312878 is a wasteful number, since it uses less digits than its factorization.

312878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218.

The product of its digits is 2688, while the sum is 29.

The square root of 312878 is about 559.3549856755. The cubic root of 312878 is about 67.8877907198.

The spelling of 312878 in words is "three hundred twelve thousand, eight hundred seventy-eight".