889820 has 12 divisors (see below), whose sum is σ = 1868664. Its totient is φ = 355920.

The previous prime is 889783. The next prime is 889829. The reversal of 889820 is 28988.

889820 = 330² + 331² + ... + 337².

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 889820.

It is not an unprimeable number, because it can be changed into a prime (889829) by changing a digit.

889820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22226 + ... + 22265.

It is an arithmetic number, because the mean of its divisors is an integer number (155722).

2⁸⁸⁹⁸²⁰ is an apocalyptic number.

It is an amenable number.

889820 is an abundant number, since it is smaller than the sum of its proper divisors (978844).

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

889820 is a wasteful number, since it uses less digits than its factorization.

889820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44500 (or 44498 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 889820 is about 943.3027085724. The cubic root of 889820 is about 96.1835320033.

The spelling of 889820 in words is "eight hundred eighty-nine thousand, eight hundred twenty".