998784 has 96 divisors (see below), whose sum is σ = 3131400. Its totient is φ = 313344.

The previous prime is 998779. The next prime is 998813. The reversal of 998784 is 487899.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

998784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58744 + ... + 58760.

2⁹⁹⁸⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565700).

998784 is an abundant number, since it is smaller than the sum of its proper divisors (2132616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998784 is a wasteful number, since it uses less digits than its factorization.

998784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 22 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 998784 is about 999.3918150555. The cubic root of 998784 is about 99.9594502260.

The spelling of 998784 in words is "nine hundred ninety-eight thousand, seven hundred eighty-four".