312378387 has 8 divisors (see below), whose sum is σ = 434613504. Its totient is φ = 199197768.

The previous prime is 312378371. The next prime is 312378421. The reversal of 312378387 is 783873213.

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

It is not a de Polignac number, because 312378387 - 2⁴ = 312378371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312378317) 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, 2263543 + ... + 2263680.

It is an arithmetic number, because the mean of its divisors is an integer number (54326688).

Almost surely, 2^312378387 is an apocalyptic number.

312378387 is a deficient number, since it is larger than the sum of its proper divisors (122235117).

312378387 is a wasteful number, since it uses less digits than its factorization.

312378387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527249.

The product of its digits is 169344, while the sum is 42.

The square root of 312378387 is about 17674.2294598661. The cubic root of 312378387 is about 678.5163638019.

The spelling of 312378387 in words is "three hundred twelve million, three hundred seventy-eight thousand, three hundred eighty-seven".