998368889 has 32 divisors (see below), whose sum is σ = 1257984000. Its totient is φ = 772542144.

The previous prime is 998368879. The next prime is 998368909. The reversal of 998368889 is 988863899.

It is a cyclic number.

It is not a de Polignac number, because 998368889 - 2⁴ = 998368873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998368849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1189532 + ... + 1190370.

It is an arithmetic number, because the mean of its divisors is an integer number (39312000).

Almost surely, 2^998368889 is an apocalyptic number.

It is an amenable number.

998368889 is a deficient number, since it is larger than the sum of its proper divisors (259615111).

998368889 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (998368888) it forms an eRAP, since the sums of their prime factors are consecutive (1276 and 1277).

998368889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277.

The product of its digits is 53747712, while the sum is 68.

The square root of 998368889 is about 31596.9759470744. The cubic root of 998368889 is about 999.4560004515.

The spelling of 998368889 in words is "nine hundred ninety-eight million, three hundred sixty-eight thousand, eight hundred eighty-nine".