998318 has 4 divisors (see below), whose sum is σ = 1497480. Its totient is φ = 499158.

The previous prime is 998311. The next prime is 998329. The reversal of 998318 is 813899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 813899 = 47 ⋅17317.

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 998318.

It is not an unprimeable number, because it can be changed into a prime (998311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249578 + ... + 249581.

It is an arithmetic number, because the mean of its divisors is an integer number (374370).

2⁹⁹⁸³¹⁸ is an apocalyptic number.

998318 is a deficient number, since it is larger than the sum of its proper divisors (499162).

998318 is a wasteful number, since it uses less digits than its factorization.

998318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499161.

The product of its digits is 15552, while the sum is 38.

The square root of 998318 is about 999.1586460618. The cubic root of 998318 is about 99.9439018692.

It can be divided in two parts, 9983 and 18, that added together give a palindrome (10001).

The spelling of 998318 in words is "nine hundred ninety-eight thousand, three hundred eighteen".