998819844 has 48 divisors (see below), whose sum is σ = 2544333120. Its totient is φ = 302448640.

The previous prime is 998819777. The next prime is 998819863. The reversal of 998819844 is 448918899.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298372 + ... + 301700.

It is an arithmetic number, because the mean of its divisors is an integer number (53006940).

Almost surely, 2^998819844 is an apocalyptic number.

It is an amenable number.

998819844 is an abundant number, since it is smaller than the sum of its proper divisors (1545513276).

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

998819844 is a wasteful number, since it uses less digits than its factorization.

998819844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620 (or 5618 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 60.

The square root of 998819844 is about 31604.1111882616. Note that the first 4 decimals coincide. The cubic root of 998819844 is about 999.6064598131.

The spelling of 998819844 in words is "nine hundred ninety-eight million, eight hundred nineteen thousand, eight hundred forty-four".