998366 has 4 divisors (see below), whose sum is σ = 1497552. Its totient is φ = 499182.

The previous prime is 998353. The next prime is 998377. The reversal of 998366 is 663899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 663899 = 163 ⋅4073.

It is a congruent number.

It is an unprimeable number.

998366 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249590 + ... + 249593.

It is an arithmetic number, because the mean of its divisors is an integer number (374388).

2⁹⁹⁸³⁶⁶ is an apocalyptic number.

998366 is a deficient number, since it is larger than the sum of its proper divisors (499186).

998366 is a wasteful number, since it uses less digits than its factorization.

998366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499185.

The product of its digits is 69984, while the sum is 41.

The square root of 998366 is about 999.1826659826. The cubic root of 998366 is about 99.9455036402.

The spelling of 998366 in words is "nine hundred ninety-eight thousand, three hundred sixty-six".