988585889 has 4 divisors (see below), whose sum is σ = 989478420. Its totient is φ = 987693360.

The previous prime is 988585861. The next prime is 988585909.

988585889 is nontrivially palindromic in base 10.

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 149035264 + 839550625 = 12208^2 + 28975^2 .

It is a cyclic number.

It is not a de Polignac number, because 988585889 - 2²⁸ = 720150433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988585849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444602 + ... + 446819.

It is an arithmetic number, because the mean of its divisors is an integer number (247369605).

Almost surely, 2^988585889 is an apocalyptic number.

It is an amenable number.

988585889 is a deficient number, since it is larger than the sum of its proper divisors (892531).

988585889 is a wasteful number, since it uses less digits than its factorization.

988585889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892530.

The product of its digits is 66355200, while the sum is 68.

The square root of 988585889 is about 31441.7857158273. The cubic root of 988585889 is about 996.1807280656.

The spelling of 988585889 in words is "nine hundred eighty-eight million, five hundred eighty-five thousand, eight hundred eighty-nine".