988787889 has 12 divisors (see below), whose sum is σ = 1466850996. Its totient is φ = 641375712.

The previous prime is 988787887. The next prime is 988787897.

988787889 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 732243600 + 256544289 = 27060^2 + 16017^2 .

It is not a de Polignac number, because 988787889 - 2¹ = 988787887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (988787887) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1484334 + ... + 1484999.

It is an arithmetic number, because the mean of its divisors is an integer number (122237583).

Almost surely, 2^988787889 is an apocalyptic number.

It is an amenable number.

988787889 is a deficient number, since it is larger than the sum of its proper divisors (478063107).

988787889 is a wasteful number, since it uses less digits than its factorization.

988787889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969376 (or 2969373 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 72.

The square root of 988787889 is about 31444.9978374940. The cubic root of 988787889 is about 996.2485740683.

The spelling of 988787889 in words is "nine hundred eighty-eight million, seven hundred eighty-seven thousand, eight hundred eighty-nine".