989724 has 24 divisors (see below), whose sum is σ = 2345728. Its totient is φ = 324720.

The previous prime is 989719. The next prime is 989743. The reversal of 989724 is 427989.

989724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 989724.

It is an unprimeable number.

989724 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 7 ways as a sum of consecutive naturals, for example, 189 + ... + 1419.

2⁹⁸⁹⁷²⁴ is an apocalyptic number.

It is an amenable number.

989724 is an abundant number, since it is smaller than the sum of its proper divisors (1356004).

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

989724 is a wasteful number, since it uses less digits than its factorization.

989724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1303 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 989724 is about 994.8487322201. The cubic root of 989724 is about 99.6562866314.

The spelling of 989724 in words is "nine hundred eighty-nine thousand, seven hundred twenty-four".