998888556 has 96 divisors (see below), whose sum is σ = 2468616192. Its totient is φ = 313977600.

The previous prime is 998888531. The next prime is 998888573. The reversal of 998888556 is 655888899.

998888556 is a nontrivial binomial coefficient, being equal to C(44697, 2).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3150910 + ... + 3151226.

It is an arithmetic number, because the mean of its divisors is an integer number (25714752).

Almost surely, 2^998888556 is an apocalyptic number.

998888556 is the 44696-th triangular number.

It is an amenable number.

998888556 is an abundant number, since it is smaller than the sum of its proper divisors (1469727636).

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

998888556 is a wasteful number, since it uses less digits than its factorization.

998888556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 66.

The square root of 998888556 is about 31605.1982433270. The cubic root of 998888556 is about 999.6293813254.

The spelling of 998888556 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred fifty-six".