889400889 has 24 divisors (see below), whose sum is σ = 1384815432. Its totient is φ = 546808320.

The previous prime is 889400879. The next prime is 889400891. The reversal of 889400889 is 988004988.

It can be written as a sum of positive squares in 4 ways, for example, as 233631225 + 655769664 = 15285^2 + 25608^2 .

It is not a de Polignac number, because 889400889 - 2⁴ = 889400873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (889400839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148819 + ... + 154679.

It is an arithmetic number, because the mean of its divisors is an integer number (57700643).

Almost surely, 2^889400889 is an apocalyptic number.

It is an amenable number.

889400889 is a deficient number, since it is larger than the sum of its proper divisors (495414543).

889400889 is a wasteful number, since it uses less digits than its factorization.

889400889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177 (or 7174 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 889400889 is about 29822.8249667935. The cubic root of 889400889 is about 961.6842860899.

The spelling of 889400889 in words is "eight hundred eighty-nine million, four hundred thousand, eight hundred eighty-nine".