988888885 has 4 divisors (see below), whose sum is σ = 1186666668. Its totient is φ = 791111104.

The previous prime is 988888867. The next prime is 988888891. The reversal of 988888885 is 588888889.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229280164 + 759608721 = 15142^2 + 27561^2 .

It is a cyclic number.

It is not a de Polignac number, because 988888885 - 2⁵ = 988888853 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98888884 + ... + 98888893.

It is an arithmetic number, because the mean of its divisors is an integer number (296666667).

Almost surely, 2^988888885 is an apocalyptic number.

It is an amenable number.

988888885 is a deficient number, since it is larger than the sum of its proper divisors (197777783).

988888885 is a wasteful number, since it uses less digits than its factorization.

988888885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197777782.

The product of its digits is 94371840, while the sum is 70.

The square root of 988888885 is about 31446.6037116888. The cubic root of 988888885 is about 996.2824922614.

The spelling of 988888885 in words is "nine hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-five".