989872 has 20 divisors (see below), whose sum is σ = 2065840. Its totient is φ = 456768.

The previous prime is 989869. The next prime is 989873. The reversal of 989872 is 278989.

989872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2172 + ... + 2587.

It is an arithmetic number, because the mean of its divisors is an integer number (103292).

2⁹⁸⁹⁸⁷² is an apocalyptic number.

It is an amenable number.

989872 is an abundant number, since it is smaller than the sum of its proper divisors (1075968).

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

989872 is a wasteful number, since it uses less digits than its factorization.

989872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780 (or 4774 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 989872 is about 994.9231126072. The cubic root of 989872 is about 99.6612538059.

It can be divided in two parts, 98987 and 2, that added together give a palindrome (98989).

The spelling of 989872 in words is "nine hundred eighty-nine thousand, eight hundred seventy-two".