989740 has 48 divisors (see below), whose sum is σ = 2286144. Its totient is φ = 358400.

The previous prime is 989719. The next prime is 989743. The reversal of 989740 is 47989.

It is a happy number.

989740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 989740.

It is not an unprimeable number, because it can be changed into a prime (989743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13905 + ... + 13975.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2⁹⁸⁹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143072).

989740 is an abundant number, since it is smaller than the sum of its proper divisors (1296404).

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

989740 is a wasteful number, since it uses less digits than its factorization.

989740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 989740 is about 994.8567736112. The cubic root of 989740 is about 99.6568236471.

The spelling of 989740 in words is "nine hundred eighty-nine thousand, seven hundred forty".