989842 has 16 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 399168.

The previous prime is 989839. The next prime is 989869. The reversal of 989842 is 248989.

It is a happy number.

989842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 989795 and 989804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1842 + ... + 2317.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2⁹⁸⁹⁸⁴² is an apocalyptic number.

989842 is a deficient number, since it is larger than the sum of its proper divisors (807278).

989842 is a wasteful number, since it uses less digits than its factorization.

989842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185.

The product of its digits is 41472, while the sum is 40.

The square root of 989842 is about 994.9080359511. The cubic root of 989842 is about 99.6602469862.

The spelling of 989842 in words is "nine hundred eighty-nine thousand, eight hundred forty-two".