889787988 has 36 divisors (see below), whose sum is σ = 2309978580. Its totient is φ = 288579456.

The previous prime is 889787953. The next prime is 889787989.

889787988 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 603095364 + 286692624 = 24558^2 + 16932^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889787989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332673 + ... + 335336.

Almost surely, 2^889787988 is an apocalyptic number.

It is an amenable number.

889787988 is an abundant number, since it is smaller than the sum of its proper divisors (1420190592).

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

889787988 is a wasteful number, since it uses less digits than its factorization.

889787988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668056 (or 668051 counting only the distinct ones).

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

The square root of 889787988 is about 29829.3142395195. The cubic root of 889787988 is about 961.8237856246.

The spelling of 889787988 in words is "eight hundred eighty-nine million, seven hundred eighty-seven thousand, nine hundred eighty-eight".