889644 has 72 divisors (see below), whose sum is σ = 2585520. Its totient is φ = 236544.

The previous prime is 889639. The next prime is 889657. The reversal of 889644 is 446988.

889644 = 110² + 111² + ... + 158².

889644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9952 + ... + 10040.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2⁸⁸⁹⁶⁴⁴ is an apocalyptic number.

889644 is a gapful number since it is divisible by the number (84) 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 889644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292760).

889644 is an abundant number, since it is smaller than the sum of its proper divisors (1695876).

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

889644 is a wasteful number, since it uses less digits than its factorization.

889644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 118 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 889644 is about 943.2094147113. The cubic root of 889644 is about 96.1771901147.

The spelling of 889644 in words is "eight hundred eighty-nine thousand, six hundred forty-four".