998888555 has 16 divisors (see below), whose sum is σ = 1371038400. Its totient is φ = 684385152.

The previous prime is 998888531. The next prime is 998888573. The reversal of 998888555 is 555888899.

998888555 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 998888555 - 2⁶ = 998888491 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998888491 and 998888500.

It is an unprimeable number.

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, 33521 + ... + 55869.

It is an arithmetic number, because the mean of its divisors is an integer number (85689900).

Almost surely, 2^998888555 is an apocalyptic number.

998888555 is a deficient number, since it is larger than the sum of its proper divisors (372149845).

998888555 is a wasteful number, since it uses less digits than its factorization.

998888555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638.

The product of its digits is 41472000, while the sum is 65.

The square root of 998888555 is about 31605.1982275068. The cubic root of 998888555 is about 999.6293809919.

The spelling of 998888555 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred fifty-five".