998817568 has 36 divisors (see below), whose sum is σ = 2287474182. Its totient is φ = 428064000.

The previous prime is 998817559. The next prime is 998817569. The reversal of 998817568 is 865718899.

998817568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 846344464 + 152473104 = 29092^2 + 12348^2 .

It is not an unprimeable number, because it can be changed into a prime (998817569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316933 + ... + 320068.

Almost surely, 2^998817568 is an apocalyptic number.

998817568 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

998817568 is an abundant number, since it is smaller than the sum of its proper divisors (1288656614).

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

998817568 is a wasteful number, since it uses less digits than its factorization.

998817568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637025 (or 637010 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 61.

The square root of 998817568 is about 31604.0751802675. The cubic root of 998817568 is about 999.6057005484.

It can be divided in two parts, 9988 and 17568, that added together give a square (27556 = 166²).

The spelling of 998817568 in words is "nine hundred ninety-eight million, eight hundred seventeen thousand, five hundred sixty-eight".