889644560 has 80 divisors (see below), whose sum is σ = 2367812736. Its totient is φ = 304518144.

The previous prime is 889644533. The next prime is 889644563. The reversal of 889644560 is 65446988.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 889644499 and 889644508.

It is not an unprimeable number, because it can be changed into a prime (889644563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532847 + ... + 534513.

Almost surely, 2^889644560 is an apocalyptic number.

889644560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 889644560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183906368).

889644560 is an abundant number, since it is smaller than the sum of its proper divisors (1478168176).

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

889644560 is a wasteful number, since it uses less digits than its factorization.

889644560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2634 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The square root of 889644560 is about 29826.9099975173. The cubic root of 889644560 is about 961.7721029479.

The spelling of 889644560 in words is "eight hundred eighty-nine million, six hundred forty-four thousand, five hundred sixty".