318398 has 4 divisors (see below), whose sum is σ = 477600. Its totient is φ = 159198.

The previous prime is 318377. The next prime is 318403. The reversal of 318398 is 893813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893813 = 131 ⋅6823.

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 318398.

It is an unprimeable number.

318398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79598 + ... + 79601.

It is an arithmetic number, because the mean of its divisors is an integer number (119400).

2³¹⁸³⁹⁸ is an apocalyptic number.

318398 is a deficient number, since it is larger than the sum of its proper divisors (159202).

318398 is a wasteful number, since it uses less digits than its factorization.

318398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159201.

The product of its digits is 5184, while the sum is 32.

The square root of 318398 is about 564.2676669808. The cubic root of 318398 is about 68.2847059685.

The spelling of 318398 in words is "three hundred eighteen thousand, three hundred ninety-eight".