889864 has 16 divisors (see below), whose sum is σ = 1709820. Its totient is φ = 433920.

The previous prime is 889829. The next prime is 889871. The reversal of 889864 is 468988.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 2500 = 942^2 + 50^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 889864.

It is a congruent number.

It is an unprimeable number.

889864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029 + ... + 1684.

2⁸⁸⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

889864 is a deficient number, since it is larger than the sum of its proper divisors (819956).

889864 is a wasteful number, since it uses less digits than its factorization.

889864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760 (or 2756 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 889864 is about 943.3260305960. The cubic root of 889864 is about 96.1851173448.

The spelling of 889864 in words is "eight hundred eighty-nine thousand, eight hundred sixty-four".