312378 has 16 divisors (see below), whose sum is σ = 681696. Its totient is φ = 94640.

The previous prime is 312371. The next prime is 312383. The reversal of 312378 is 873213.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (312371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (42606).

2³¹²³⁷⁸ is an apocalyptic number.

312378 is an abundant number, since it is smaller than the sum of its proper divisors (369318).

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

312378 is a wasteful number, since it uses less digits than its factorization.

312378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its digits is 1008, while the sum is 24.

The square root of 312378 is about 558.9078636054. The cubic root of 312378 is about 67.8516083601.

The spelling of 312378 in words is "three hundred twelve thousand, three hundred seventy-eight".