998764 has 12 divisors (see below), whose sum is σ = 1882384. Its totient is φ = 460944.

The previous prime is 998759. The next prime is 998779. The reversal of 998764 is 467899.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 998764.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 9552 + ... + 9655.

2⁹⁹⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

998764 is a deficient number, since it is larger than the sum of its proper divisors (883620).

998764 is a wasteful number, since it uses less digits than its factorization.

998764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224 (or 19222 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 998764 is about 999.3818089199. The cubic root of 998764 is about 99.9587830139.

The spelling of 998764 in words is "nine hundred ninety-eight thousand, seven hundred sixty-four".