998888557 has 16 divisors (see below), whose sum is σ = 1044014400.
Its totient is φ = 954535680.
The previous prime is 998888531. The next prime is 998888573. The reversal of 998888557 is 755888899.
It is a cyclic number.
It is not a de Polignac number, because 998888557 - 211 = 998886509 is a prime.
It is a pancake number, because a pancake can be divided into 998888557 parts by 44696 straight cuts.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 998888492 and 998888501.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (998888587) 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 15 ways as a sum of consecutive naturals, for example, 1749082 + ... + 1749652.
It is an arithmetic number, because the mean of its divisors is an integer number (65250900).
Almost surely, 2998888557 is an apocalyptic number.
It is an amenable number.
998888557 is a deficient number, since it is larger than the sum of its proper divisors (45125843).
998888557 is a wasteful number, since it uses less digits than its factorization.
998888557 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1116.
The product of its digits is 58060800, while the sum is 67.
The square root of 998888557 is about 31605.1982591472.
The cubic root of 998888557 is about 999.6293816590.
The spelling of 998888557 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred fifty-seven".