889840 has 60 divisors (see below), whose sum is σ = 2417256. Its totient is φ = 303744.

The previous prime is 889829. The next prime is 889871. The reversal of 889840 is 48988.

889840 = 151² + 152² + ... + 182².

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 889840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3807 + ... + 4033.

2⁸⁸⁹⁸⁴⁰ is an apocalyptic number.

889840 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 889840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208628).

889840 is an abundant number, since it is smaller than the sum of its proper divisors (1527416).

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

889840 is a wasteful number, since it uses less digits than its factorization.

889840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 889840 is about 943.3133095637. The cubic root of 889840 is about 96.1842526195.

The spelling of 889840 in words is "eight hundred eighty-nine thousand, eight hundred forty".