989040 has 80 divisors (see below), whose sum is σ = 3312288. Its totient is φ = 242688.

The previous prime is 989029. The next prime is 989059. The reversal of 989040 is 40989.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 988989 and 989007.

It is a congruent number.

It is an unprimeable number.

989040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2962 + ... + 3278.

2⁹⁸⁹⁰⁴⁰ 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 989040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1656144).

989040 is an abundant number, since it is smaller than the sum of its proper divisors (2323248).

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

989040 is a wasteful number, since it uses less digits than its factorization.

989040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 989040 is about 994.5049019487. The cubic root of 989040 is about 99.6333237956.

The spelling of 989040 in words is "nine hundred eighty-nine thousand, forty".