998748 has 18 divisors (see below), whose sum is σ = 2524704. Its totient is φ = 332904.

The previous prime is 998743. The next prime is 998749. The reversal of 998748 is 847899.

It is a tau number, because it is divible by the number of its divisors (18).

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 998748.

It is not an unprimeable number, because it can be changed into a prime (998743) by changing a digit.

998748 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 in 5 ways as a sum of consecutive naturals, for example, 13836 + ... + 13907.

2⁹⁹⁸⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

998748 is an abundant number, since it is smaller than the sum of its proper divisors (1525956).

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

998748 is a wasteful number, since it uses less digits than its factorization.

998748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27753 (or 27748 counting only the distinct ones).

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

The square root of 998748 is about 999.3738039392. The cubic root of 998748 is about 99.9582492378.

The spelling of 998748 in words is "nine hundred ninety-eight thousand, seven hundred forty-eight".