312398 has 8 divisors (see below), whose sum is σ = 493320. Its totient is φ = 147960.

The previous prime is 312397. The next prime is 312401. The reversal of 312398 is 893213.

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

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 312398.

It is not an unprimeable number, because it can be changed into a prime (312397) 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, 4073 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (61665).

2³¹²³⁹⁸ is an apocalyptic number.

312398 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

312398 is a deficient number, since it is larger than the sum of its proper divisors (180922).

312398 is a wasteful number, since it uses less digits than its factorization.

312398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242.

The product of its digits is 1296, while the sum is 26.

The square root of 312398 is about 558.9257553558. The cubic root of 312398 is about 67.8530563955.

The spelling of 312398 in words is "three hundred twelve thousand, three hundred ninety-eight".