889440 has 96 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 221184.

The previous prime is 889439. The next prime is 889453. The reversal of 889440 is 44988.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×889440² = 1582207027200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8106 + ... + 8214.

It is an arithmetic number, because the mean of its divisors is an integer number (31185).

2⁸⁸⁹⁴⁴⁰ is an apocalyptic number.

889440 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 889440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496880).

889440 is an abundant number, since it is smaller than the sum of its proper divisors (2104320).

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

889440 is a wasteful number, since it uses less digits than its factorization.

889440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 889440 is about 943.1012670970. The cubic root of 889440 is about 96.1698382426.

The spelling of 889440 in words is "eight hundred eighty-nine thousand, four hundred forty".